Traffic_ Why We Drive The Way We Do Part 1

Traffic_ Why We Drive the Way We Do (And What It Says About Us).

by Tom Vanderbilt.

Prologue

Why I Became a Late Merger (and Why You Should Too) Why does the other lane always seem to be moving faster?

It is a question you have no doubt asked yourself while crawling down some choked highway, watching with mounting frustration as the adjacent cars glide ahead. You drum the wheel with your fingers. You change the radio station. You fixate on one car as a benchmark of your own lack of progress. You try to figure out what that weird b.u.t.ton next to the rear-window defroster actually does.

I used to think this was just part of the natural randomness of the highway. Sometimes fate would steer me into the faster lane, sometimes it would relinquish me to the slow lane.

That was until recently, when I had an experience that made me rethink my traditionally pa.s.sive outlook on the road, and upset the careful set of a.s.sumptions that had always guided my behavior in traffic.

I made a major lifestyle change. I became a late merger. late merger.

Chances are, at some point you have found yourself driving along the highway when a sign announces that the left lane, in which you are traveling, will close one mile ahead, and that you must merge right.

You notice an opening in the right lane and quickly move over. You breathe a sigh, happy to be safely ensconced in the Lane That Will Not End. Then, as the lane creeps to a slow halt, you notice with rising indignation that cars in the lane you have vacated are continuing to speed ahead, out of sight. You quietly seethe and contemplate returning to the much faster left lane-if only you could work an opening. You grimly accept your condition.

One day, not long ago, I had an epiphany on a New Jersey highway. I was having a typical white-knuckle drive among the scenic oil-storage depots and chemical-processing plants of northern Jersey when suddenly, on the approach to the Pulaski Skyway, the sign loomed: LANE ENDS ONE MILE. MERGE RIGHT. LANE ENDS ONE MILE. MERGE RIGHT.

Seized by some rash impulse, I avoided the instinctual tickle at the back of my brain telling me to get in the already crowded right lane. Just do what the sign says, Just do what the sign says, that voice usually counsels. Instead, I listened to another, more insistent voice: that voice usually counsels. Instead, I listened to another, more insistent voice: Don't be a sucker. You can do better. Don't be a sucker. You can do better. I plowed purposefully ahead, oblivious to the hostile stares of other drivers. From the corner of my eye I could see my wife cringing. After pa.s.sing dozens of cars, I made it to the bottleneck point, where, filled with new-found swagger, I took my rightful turn in the small alternating "zipper" merge that had formed. I merged, and it was clear asphalt ahead. My heart was beating faster. My wife covered her face with her hands. I plowed purposefully ahead, oblivious to the hostile stares of other drivers. From the corner of my eye I could see my wife cringing. After pa.s.sing dozens of cars, I made it to the bottleneck point, where, filled with new-found swagger, I took my rightful turn in the small alternating "zipper" merge that had formed. I merged, and it was clear asphalt ahead. My heart was beating faster. My wife covered her face with her hands.

In the days after, a creeping guilt and confusion took hold. Was I wrong to have done this? Or had I been doing it wrong all my life? Looking for an answer, I posted an anonymous inquiry on Ask MetaFilter, a Web site one can visit to ask random questions and tap into the "hive mind" of an anonymous audience of overeducated and overopinionated geeks. Why should one lane move faster than the other, I wanted to know, and why are people rewarded for merging at the last possible moment? And was my new lifestyle, that of the late merger, somehow deviant?

I was startled by the torrent of responses, and how quickly they came. What struck me most was the pa.s.sion and conviction with which people argued their various cases-and the fact that while many people seemed to think I was wrong, almost as many seemed to think I was right. Rather than easy consensus, I had stumbled into a gaping divide of irreconcilable belief.

The first camp-let us name it after the b.u.mper sticker that says PRACTICE RANDOM ACTS OF KINDNESS PRACTICE RANDOM ACTS OF KINDNESS-viewed early mergers as virtuous souls doing the right thing and late mergers as arrogant louts. "Unfortunately, people suck," wrote one Random Acts poster. "They'll try whatever they can to pa.s.s you, to better enjoy the traffic jam from a few car lengths ahead of you.... People who feel that they have more pressing concerns and are generally more important than you will keep going, and some weak-spined schmuck will let them in further down, slowing your progress even more. This sucks; I'm afraid it's the way of the world."

Another camp, the minority camp-let's call them Live Free or Die, after the license-plate motto of the state of New Hamps.h.i.+re-argued that the late mergers were quite rationally utilizing the highway's maximum capacity, thus making life better for everyone. In their view, the other group's attempts toward politeness and fairness were actually detrimental to all.

It got more complicated. Some argued that late merges caused more accidents. Some said the system worked much better in Germany, and hinted that my dilemma perhaps revealed some national failing in the American character. Some said they were afraid of not being "let in" at the last moment; some said they would actively try to block someone from merging, the way truckers often do.

So what was going on here? Are we not all driving the same road, did we not all pa.s.s the same driving tests? What was puzzling was not just the variety of responses but the sense of moral righteousness each person attributed to his or her highway behavior, and the vitriol each person reserved for those holding the opposite view. For the most part, people were not citing traffic laws or actual evidence but their own personal sense of what was right.

I even found someone claiming to have had a conversion experience exactly the opposite of mine. "Until very recently, I was a 'late merger,'" wrote the author, an executive with a software company, in a business magazine. Why had he become a born-again early merger? "Because I came to realize that traffic flowed faster the sooner people merged." He used this as a metaphor for successful team building in corporate America, in which "late mergers" were those who consistently put their own opinions and motives above the greater company. "Early mergers," he wrote, could help push companies to their "maximum communal speed."

But did traffic flow faster when people merged sooner? Or did it just seem more n.o.ble to think that it did?

You may suspect that getting people to merge in a timely fas.h.i.+on, and without killing one another, is less of a traffic problem and more of a human human problem. The road, more than simply a system of regulations and designs, is a place where many millions of us, with only loose parameters for how to behave, are thrown together daily in a kind of ma.s.sive petri dish in which all kinds of uncharted, little-understood dynamics are at work. There is no other place where so many people from different walks of life-different ages, races, cla.s.ses, religions, genders, political preferences, lifestyle choices, levels of psychological stability-mingle so freely. problem. The road, more than simply a system of regulations and designs, is a place where many millions of us, with only loose parameters for how to behave, are thrown together daily in a kind of ma.s.sive petri dish in which all kinds of uncharted, little-understood dynamics are at work. There is no other place where so many people from different walks of life-different ages, races, cla.s.ses, religions, genders, political preferences, lifestyle choices, levels of psychological stability-mingle so freely.

What do we really know about how it all works? Why do we act the way we do on the road, and what might that say about us? Are certain people predisposed to drive certain ways? Do women behave differently than men? And if, as conventional wisdom has it, drivers have become progressively less civil over the past several decades, why is that so? Is the road a microcosm of society, or its own place with its own set of rules? I have a friend, an otherwise timorous Latin teacher, who once told me how, in a modest Toyota Corolla, he had defiantly "stuck it" to the driver of an eighteen-wheeler who he felt was hogging the road. Some mysterious force had turned this gentle suburban scholar into the Travis Bickle of the turnpike. (Are you tailgatin' me?) Was it traffic, or had the beast always been lurking within?

The more you think about it-or, rather, the more time you spend in traffic with time to think about it-the more these sorts of puzzling questions swim to the surface. Why can one sit in traffic jams that seem to have no source? Why does a ten-minute "incident" create one hundred minutes of gridlock? Do people really take longer to vacate a parking spot when someone else is waiting, or does it just seem so? Do the car-pool lanes on highways help fight congestion or cause more of it? Just how dangerous are large trucks? How does what we drive, where we drive, and with whom we drive affect the way way we drive? Why do so many New Yorkers jaywalk, while hardly anyone in Copenhagen does? Is New Delhi's traffic as chaotic as it seems, or does a beautiful order lurk beneath the frenzied surface? we drive? Why do so many New Yorkers jaywalk, while hardly anyone in Copenhagen does? Is New Delhi's traffic as chaotic as it seems, or does a beautiful order lurk beneath the frenzied surface?

Like me, you may have wondered: What could traffic tell us, if someone would just stop to listen?

The first thing you hear is the word itself. Traffic. Traffic. What did you think of when you read that word? In all likelihood you pictured a crowded highway, filled with people obstructing your progress. It was not a pleasant thought. This is interesting, because for most of its long life the word What did you think of when you read that word? In all likelihood you pictured a crowded highway, filled with people obstructing your progress. It was not a pleasant thought. This is interesting, because for most of its long life the word traffic traffic has had rather positive connotations. It originally referred (and still does) to trade and the movement of goods. That meaning slowly expanded to include the people engaging in that trade and the dealings among people themselves-Shakespeare's prologue to has had rather positive connotations. It originally referred (and still does) to trade and the movement of goods. That meaning slowly expanded to include the people engaging in that trade and the dealings among people themselves-Shakespeare's prologue to Romeo and Juliet Romeo and Juliet describes the "traffic of our stage." It then came to signify the movement itself, as in the "traffic on this road." At some point, people and things became interchangeable. The movement of goods and people were intertwined in a single enterprise; after all, if one was going somewhere, it was most likely in pursuit of commerce. This is still true today, as most traffic problems occur during the times we are all going to work, but we seem less likely to think of traffic in terms of motion and mobility, as a great river of opportunity, than as something that makes our lives miserable. describes the "traffic of our stage." It then came to signify the movement itself, as in the "traffic on this road." At some point, people and things became interchangeable. The movement of goods and people were intertwined in a single enterprise; after all, if one was going somewhere, it was most likely in pursuit of commerce. This is still true today, as most traffic problems occur during the times we are all going to work, but we seem less likely to think of traffic in terms of motion and mobility, as a great river of opportunity, than as something that makes our lives miserable.

Now, like then, we think of traffic as an abstraction, a grouping of things rather than a collection of individuals. We talk about "beating the traffic" or "getting stuck in traffic," but we never talk-in polite company, at least-about "beating people" or "getting stuck in people." The news lumps together "traffic and weather" as if they were both pa.s.sive forces largely outside our control, even though whenever we complain about it, we do so because we're part of the traffic. (To be fair, I suppose we are now part of the weather as well, thanks to the atmospheric emissions of that same driving.) We say there is "too much traffic" without exactly knowing what we mean. Are we saying there are too many people? Or that there are not enough roads for the people who are there? Or that there is too much affluence, which has enabled too many people to own cars?

One routinely hears of "traffic problems." But what is a traffic problem? To a traffic engineer, a "traffic problem" might mean that a street is running below capacity. For a parent living on that street, the "traffic problem" could be too many cars, or cars going too fast. For the store owner on that same street, a "traffic problem" might mean there is not enough traffic. Blaise Pascal, the renowned seventeenth-century French scientist and philosopher, had perhaps the only foolproof remedy for traffic: Stay home. "I have discovered that all the unhappiness of men arises from one single fact," he wrote. "That they cannot stay quietly in their own chamber." Pascal, as it happens, is credited with inventing history's first urban bus service. He died a mere five months later. Was Parisian traffic his undoing?

Whatever "traffic problem" means to you, it may give you some comfort to know that traffic problems of all variety are as old as traffic itself. Ever since humans began to propel themselves artificially, society has struggled to catch up with the implications of mobility, to sort out technical and social responses to the new demands.

Visitors to the ruins of Pompeii, for example, will see rutted streets marked by the tracks of chariot wheels. But many are wide enough for only one set of wheels. The tourist wonders: Was it a one-way street? Did a lowly commoner have to reverse himself out of the way when a member of the imperial legions came trotting along in the other direction? If two chariots arrived at an intersection simultaneously, who went first? These questions were neglected for years, but recent work by the American traffic archaeologist Eric Poehler has provided some answers.

By studying the wear patterns on curbstones at corners, as well as the stepping stones set up for pedestrians to cross the "rutways," Poehler was able to discern not just the direction of traffic but the direction of turns onto two-way streets at intersections. It seems, based on the "directionally diagnostic wear patterns" on the curbstones, that Pompeii drivers drove on the right side of the street (part of a larger cultural preference for right-handed activities), used primarily a system of one-way streets, and were banned from driving on certain streets altogether. There seemed to be no traffic signs or street signs. It may please the reader to know, however, that Pompeii did suffer from its share of road construction and detours (as when the building of baths forced the reversal of the Vico di Mercurio).

In ancient Rome, the chariot traffic grew so intense that Caesar, the self-proclaimed curator viarum, curator viarum, or "director of the great roads," declared a daytime ban on carts and chariots, "except to transport construction materials for the temples of the G.o.ds or for other great public works or to take away demolition materials." Carts could enter the city only after three p.m. And yet, as one so often finds in the world of traffic, there is very rarely an action without an equal and opposite reaction. By making it easier for the average Roman to move around during the day, Caesar made it harder for them to sleep at night. The poet Juvenal, sounding like a second-century version of a contemporary Roman complaining about scooter traffic, lamented, "Only if one has a lot of money can one sleep in Rome. The source of the problem lies in the carts pa.s.sing through the bottlenecks of the curved streets, and the flocks that stop and make so much noise they would prevent...even a devil-fish from sleeping." or "director of the great roads," declared a daytime ban on carts and chariots, "except to transport construction materials for the temples of the G.o.ds or for other great public works or to take away demolition materials." Carts could enter the city only after three p.m. And yet, as one so often finds in the world of traffic, there is very rarely an action without an equal and opposite reaction. By making it easier for the average Roman to move around during the day, Caesar made it harder for them to sleep at night. The poet Juvenal, sounding like a second-century version of a contemporary Roman complaining about scooter traffic, lamented, "Only if one has a lot of money can one sleep in Rome. The source of the problem lies in the carts pa.s.sing through the bottlenecks of the curved streets, and the flocks that stop and make so much noise they would prevent...even a devil-fish from sleeping."

By the time we get to medieval England, we can see that traffic was still a problem in search of a solution. Towns tried to limit, through laws or tolls, where and when traveling merchants could sell things. Magistrates restricted the entry of "shod carts" into towns because they damaged bridges and roads. In one town, horses were forbidden to drink at the river, as children were often found playing nearby. Speeding became a social problem. The Liber Albus, Liber Albus, the rule book of fifteenth-century London, forbade a driver to "drive his cart more quickly when it is unloaded than when it is loaded" (if he did, he would be looking at a forty-pence speeding ticket or, more drastically, "having his body committed to prison at the will of the Mayor"). the rule book of fifteenth-century London, forbade a driver to "drive his cart more quickly when it is unloaded than when it is loaded" (if he did, he would be looking at a forty-pence speeding ticket or, more drastically, "having his body committed to prison at the will of the Mayor").

In 1720, traffic fatalities from "furiously driven" carts and coaches were named the leading cause of death in London (eclipsing fire and "immoderate quaffing"), while commentators decried the "Controversies, Quarreling, and Disturbances" caused by drivers "contesting for the way." Meanwhile, in the New York of 1867, horses were killing an average of four pedestrians a week (a bit higher than today's rate of traffic fatalities, although there were far fewer people and far fewer vehicles). Spooked runaways trampled pedestrians underfoot, "reckless drivers" paid little heed to the 5-mile-an-hour speed limit, and there was little concept of right-of-way. "As matters now stand," the New York Times New York Times wrote in 1888, "drivers seem to be legally justified in ignoring crossings and causing [pedestrians] to run or dodge over vehicles when they wish to pa.s.s over." wrote in 1888, "drivers seem to be legally justified in ignoring crossings and causing [pedestrians] to run or dodge over vehicles when they wish to pa.s.s over."

The larger the cities grew, and the more ways people devised to get around those cities, the more complicated traffic became, and the more difficult to manage. Take, for instance, the scene that occurred on lower Broadway in New York City on the afternoon of December 23, 1879, an "extraordinary and unprecedented blockade of traffic" that lasted five hours. Who was in this "nondescript jam," as the New York Times New York Times called it? The list is staggering: "single and double teams, double teams with a tandem leader, and four-horse teams; hacks, coupes, trucks, drays, butcher carts, pa.s.senger stages, express wagons, grocers' and hucksters' wagons, two-wheeled 'dog carts,' furniture carts and piano trucks, and jewelers' and fancy goods dealers' light delivery wagons, and two or three advertising vans, with flimsy transparent canvas sides to show illumination at night." called it? The list is staggering: "single and double teams, double teams with a tandem leader, and four-horse teams; hacks, coupes, trucks, drays, butcher carts, pa.s.senger stages, express wagons, grocers' and hucksters' wagons, two-wheeled 'dog carts,' furniture carts and piano trucks, and jewelers' and fancy goods dealers' light delivery wagons, and two or three advertising vans, with flimsy transparent canvas sides to show illumination at night."

Just when it seemed as if things could not get more complicated on the road, along came a novel and controversial machine, the first new form of personal transportation since the days of Caesar's Rome, a new-fangled contrivance that upset the fragile balance of traffic. I am talking, of course, about the bicycle.

After a couple of false starts, the "bicycle boom" of the late nineteenth century created a social furor. Bicycles were too fast. They threatened their riders with strange ailments, like kyphosis bicyclistarum, kyphosis bicyclistarum, or "bicycle stoop." They spooked horses and caused accidents. Fisticuffs were exchanged between cyclists and noncyclists. Cities tried to ban them outright. They were restricted from streets because they were not coaches, and restricted from sidewalks because they were not pedestrians. The bicycle activists of today who argue that cars should not be allowed in places like Brooklyn's Prospect Park were preceded, over a hundred years ago, by "wheelmen" fighting for the right for bicycles to be allowed in that same park. New bicycle etiquette questions were broached: Should men yield the right-of-way to women? or "bicycle stoop." They spooked horses and caused accidents. Fisticuffs were exchanged between cyclists and noncyclists. Cities tried to ban them outright. They were restricted from streets because they were not coaches, and restricted from sidewalks because they were not pedestrians. The bicycle activists of today who argue that cars should not be allowed in places like Brooklyn's Prospect Park were preceded, over a hundred years ago, by "wheelmen" fighting for the right for bicycles to be allowed in that same park. New bicycle etiquette questions were broached: Should men yield the right-of-way to women?

There is a pattern here, from the chariot in Pompeii to the Segway in Seattle. Once humans decided to do anything but walk, once they became "traffic," they had to learn a whole new way of getting around and getting along. What is the road for? Who is the road for? How will these streams of traffic flow together? Before the dust kicked up by the bicycles had even settled, the whole order was toppled again by the automobile, which was beginning to careen down those same "good roads" the cyclists themselves, in a bit of tragic irony, had helped create.

When driving began, it was like a juggernaut, and we have rarely had time to pause and reflect upon the new kind of life that was being made. When the first electric car debuted in mid-nineteenth-century England, the speed limit was hastily set at 4 miles per hour-the speed at which a man carrying a red flag could run ahead of a car entering a town, an event that was still a quite rare occurrence. That man with the red flag racing the car was like a metaphor of traffic itself. It was probably also the last time the automobile existed at anything like human speed or scale. The car was soon to create a world of its own, a world in which humans, separated from everything outside the car but still somehow connected, would move at speeds beyond anything for which their evolutionary history had prepared them.

At first, cars simply joined the chaotic traffic already in the street, where the only real rule of the road in most North American cities was "keep to the right." In 1902, William Phelps Eno, a "well-known yachtsman, clubman, and Yale graduate" who would become known as "the first traffic technician of the whole world," set about untangling the strangling miasma that was New York City's streets. (Deaths by automobile were already, according to the New York Times, New York Times, "every-day occurrences" with little "news value" unless they involved persons of "exceptional social or business prominence.") Eno was every bit the WASP patrician as social reformer, a familiar character then in New York. He thundered at "the stupidity of drivers, pedestrians and police" and bluntly wielded his favorite maxim: "It is easy to control a trained army but next to impossible to regulate a mob." Eno proposed a series of "radical ordinances" to rein in New York's traffic, a plan that seems hopelessly quaint now, with its instructions on the "right way to turn a corner" and its audacious demands that cars go in only "every-day occurrences" with little "news value" unless they involved persons of "exceptional social or business prominence.") Eno was every bit the WASP patrician as social reformer, a familiar character then in New York. He thundered at "the stupidity of drivers, pedestrians and police" and bluntly wielded his favorite maxim: "It is easy to control a trained army but next to impossible to regulate a mob." Eno proposed a series of "radical ordinances" to rein in New York's traffic, a plan that seems hopelessly quaint now, with its instructions on the "right way to turn a corner" and its audacious demands that cars go in only one one direction around Columbus Circle. But Eno, who became a global celebrity of sorts, boating off to Paris and So Paulo to solve local traffic problems, was as much a social engineer as a traffic engineer, teaching vast numbers of people to act and communicate in new ways, often against their will. direction around Columbus Circle. But Eno, who became a global celebrity of sorts, boating off to Paris and So Paulo to solve local traffic problems, was as much a social engineer as a traffic engineer, teaching vast numbers of people to act and communicate in new ways, often against their will.

In the beginning this language was more Tower of Babel than Esperanto. In one town, the blast of a policeman's whistle might mean stop, in another go. A red light indicated one thing here, another thing there. The first stop signs were yellow, even though many people thought they should be red. As one traffic engineer summed up early-twentieth-century traffic control, "there was a great wave of arrow lenses, purple lenses, lenses with crosses, etc., all giving special instructions to the motorist, who, as a rule, hadn't the faintest idea of what these special indications meant." The systems we take for granted today required years of evolution, and were often steeped in controversy. The first traffic lights had two indications, one for stop and one for go. Then someone proposed a third light, today's "amber phase," so cars would have time to clear the intersection. Some engineers resisted this, on the grounds that vehicles were "amber rus.h.i.+ng," or trying to beat the light, which actually made things more dangerous. Others wanted the yellow light shown before the signal was changing to red and and before it was changing from red back to green (which one sees today in Denmark, among other places, but nowhere in North America). There were strange regional one-offs that never caught on; for example, a signal at the corner of Wils.h.i.+re and Western in Los Angeles had a small clock whose hand revealed to the approaching driver how much "green" or "red" time remained. before it was changing from red back to green (which one sees today in Denmark, among other places, but nowhere in North America). There were strange regional one-offs that never caught on; for example, a signal at the corner of Wils.h.i.+re and Western in Los Angeles had a small clock whose hand revealed to the approaching driver how much "green" or "red" time remained.

Were red and green even the right colors? In 1923 it was pointed out that approximately one in ten people saw only gray when looking at a traffic signal, because of color blindness. Might not blue and yellow, which almost everyone could see, be better? Or would that create catastrophic confusion among all those who had already learned red and green? Despite all the uncertainty, traffic engineering soon hoisted itself onto a wobbly pedestal of authority, even if, as the transportation historian Jeffrey Brown argues, engineers' neutral-sounding Progressive scientific ideology, which compared "curing" congestion to fighting typhoid, reflected the desires of a narrow band of urban elites (i.e., car owners). Thus it was quickly established that the prime objective of a street was simply to move as many cars as quickly as possible-an idea that obscured, as it does to this day, the many other roles of city streets.

After more than a century of tinkering with traffic, plus years of tradition and scientific research, one would think all these issues would have been smoothed out. And they have been, largely. We drive in a landscape that looks virtually the same wherever we go: A red light in Morocco means the same thing as it does in Montana. A walk "man" that moves us across a street in Berlin does the same in Boston, even if the "man" looks a bit different. (The beloved jaunty, hat-clad Ampelmannchen Ampelmannchen of the former German Democratic Republic has survived the collapse of the Berlin Wall.) We drive on highways that have been so perfectly engineered we forget we are moving at high speeds-indeed, we are sometimes barely aware of moving at all. of the former German Democratic Republic has survived the collapse of the Berlin Wall.) We drive on highways that have been so perfectly engineered we forget we are moving at high speeds-indeed, we are sometimes barely aware of moving at all.

For all this standardized sameness, though, there is much that is still simply not known about how to manage the flows of all those people in traffic-drivers, walkers, cyclists, and others-in the safest and most efficient manner. For example, you may have seen, in some cities, a "countdown signal" that indicates, in seconds, exactly how much time you have before the "Walk" signal will change to "Don't Walk." Some people in the traffic world think this innovation has made things better for pedestrians, but it is just as easy to find others who think it offers no improvement at all. Some people think that marked bicycle lanes on streets are the ideal for cyclists, while others prefer separated lanes; still others suggest that maybe having no bicycle lanes at all would be best for bike riders. For a time it was thought that highway traffic would flow better and more safely if trucks were forced to obey a slower speed limit than cars. But "differential speed limits" just seemed to swap out one kind of crash risk for another, with no overall safety benefit, so the "DSLs" were gradually rolled back.

Henry Barnes, the legendary traffic commissioner of New York City in the 1960s, reflecting on his long career in his charmingly t.i.tled memoir The Man with the Red and Green Eyes, The Man with the Red and Green Eyes, observed that "traffic was as much an emotional problem as it was a physical and mechanical one." People, he concluded, were tougher to crack than cars. "As time goes on the technical problems become more automatic, while the people problems become more surrealistic." observed that "traffic was as much an emotional problem as it was a physical and mechanical one." People, he concluded, were tougher to crack than cars. "As time goes on the technical problems become more automatic, while the people problems become more surrealistic."

That "surrealistic" side of traffic will be the focus of this book. I began my research with the intention of stopping to take a look around at an environment that has become so familiar we no longer see it; I wanted to slow down for a moment and think about what's going on out there as we drive, walk, cycle, or find some other way to get around. (Look out for the SKATEBOARD ROUTE SKATEBOARD ROUTE signs the next time you're in Portland, Oregon.) My aim was to learn to read between the dotted lines on the highway, sift through the strange patterns that traffic contains, interpret the small feints, dodges, parries, and thrusts between vehicles. I would study not only the traffic signals we obey but also the traffic signals we send. signs the next time you're in Portland, Oregon.) My aim was to learn to read between the dotted lines on the highway, sift through the strange patterns that traffic contains, interpret the small feints, dodges, parries, and thrusts between vehicles. I would study not only the traffic signals we obey but also the traffic signals we send.

Many of us, myself included, seem to take driving a car fairly lightly, perhaps holding on to some simple myths of independence and power, but it is actually an incredibly complex and demanding task: We are navigating through a legal system, we are becoming social actors in a spontaneous setting, we are processing a bewildering amount of information, we are constantly making predictions and calculations and on-the-fly judgments of risk and reward, and we're engaging in a huge amount of sensory and cognitive activity-the full scope of which scientists are just beginning to understand.

Much of our mobile life is still shrouded in mystery and murk. We welcome into our vehicles new technologies like cell phones, in-car navigation systems, and "radio display system" radios (which show song t.i.tles) before we have had time to understand the complicated effects those devices might have on our driving. Opinion is often divided on the most fundamental aspects of how we should do things. Should hands be at ten a.m. and two p.m. on the steering wheel, as we were once taught-or have air bags made that a dangerous proposition? When changing lanes, is it sufficient to simply signal and check the mirrors? Or should you turn your head and glance over your shoulder? Relying on mirrors alone leaves one open to blind spots, which engineers say can exist on any car (indeed, they almost seemed designed to occur at the most inconvenient and dangerous place, the area just behind and to the left of the driver). But turning your head means not looking forward, perhaps for that vital second. "Head checks are one of the most dangerous things you can do," says the research director of a highway safety agency.

So what do we do? If these issues aren't complicated enough, consider the right side-view mirror itself. In the United States, the driver will notice that their pa.s.senger side-view mirror is convex; it usually carries a warning such as "Objects in mirror are closer than they appear." The driver's side mirror is not. In Europe, both mirrors are convex. "What you have today is this clearly pretty wrong situation," says Michael Flannagan, a researcher at the University of Michigan who specializes in driver vision. "It's wrong in the sense that Europe does one thing, the U.S. does another. They can't both both be optimal. These are both entrenched traditions, neither of which is fully based on rational, explicit argument." The mirror, as with so many things in traffic, is more complicated than it might appear. be optimal. These are both entrenched traditions, neither of which is fully based on rational, explicit argument." The mirror, as with so many things in traffic, is more complicated than it might appear.

And so we drive around with vague ideas of how things work. Every last one of us is a "traffic expert," but our vision is skewed. We see things only through our own winds.h.i.+elds. It is a repeated truism, borne out by insurance company surveys, for example, that most accidents happen very close to home. On first glance, it makes statistical sense: You're likely to take more trips, and spend more time in the car, in your immediate surroundings. But could there be something deeper at work? Habits, psychologists suggest, provide a way to reduce the amount of mental energy that must be expended on routine tasks. Habits also form a mind-set, which gives us cues on how to behave in certain settings. So when we enter a familiar setting, like the streets around our house, habitual behavior takes over. On the one hand, this is efficient: It frees us from having to gather all sorts of new information, from getting sidetracked. Yet on the other hand, because we are expending less energy on a.n.a.lyzing what is around us, we may be letting our mental guard down. If in three years there has never been a car coming out of the Joneses' driveway in the morning, what happens on the first day of the fourth year, when suddenly there is? Will we see it in time? Will we see it at all? Our feeling of safety and control is also a weakness. A study by a group of Israeli researchers found that drivers committed more traffic violations on familiar routes than on unfamiliar routes.

Surely you have had a moment when you were driving down the road and suddenly found yourself "awake at the wheel," unable to remember the last few minutes. In a way, much of the time we spend in traffic is like that, a kind of gauzy dream state of automatic muscle movements and half-remembered images. Traffic is an in-between time in which we are more likely to think about where we are going than where we are at the moment. Time and s.p.a.ce are skewed in traffic; our vision is fragmented and often unclear, and we take in and then almost immediately forget hundreds, perhaps thousands of images and impressions. Every minute we are surrounded by a different group of people, people we will share s.p.a.ce with but never talk to, never meet.

Considering that many of us may spend more time in traffic than we do eating meals with our family, going on vacation, or having s.e.x, it seems worth probing a bit deeper into the experience. As an American in the early twenty-first century, I live in the most auto-dependent, car-adapted, mileage-happy society in the history of the planet. We spend more on driving than on food or health care. As of the last census, there were more cars than citizens. In 1960, hardly any household had three vehicles, and most had only one. Now more own three than own one. Even as the size of the average North American family has fallen over the past several decades, the number of homes with multicar garages has almost doubled-one in five new homes has a three-car garage.

To pay for all that extra s.p.a.ce, commute times have also been expanding. One of the fastest-growing categories in the last "commuting census" in the United States was that of "extreme commuters," people who spend upward of two hours a day in traffic (moving or otherwise). Many of these are people pushed farther out by higher home prices, past the billboards that beckon "If you lived here, you'd be home by now," in a phenomenon real estate agents call "drive till you qualify"-in other words, trading miles for mortgage. The average American, as of 2005, spent thirty-eight hours annually stuck in traffic. In 1969, nearly half of American children walked or biked to school; now just 16 percent do. From 1977 to 1995, the number of trips people made on foot dropped by nearly half. This has given rise to a joke: In America, a pedestrian is someone who has just parked their car.

Traffic has become a way of life. The expanding car cup holder, which became fully realized standard equipment only in the 1980s, is now the vital enabler of dashboard dining, a "food and beverage venue" hosting such products as Campbell's Soup at Hand and Yoplait's Go-Gurt. In 2001, there were 134 food products that featured the word go go on the label or in ads; by 2004, there were 504. Accordingly, the number of what the industry calls "on-the-go eating occasions" in the United States and Europe combined is predicted to rise from 73.2 billion in 2003 to 84.4 billion in 2008. Fast-food restaurants now clock as much as 70 percent of their sales at drive-through windows. (Early in our romance with the car, we used to go to "drive-in" restaurants, but those now seem relics of a gentler, slower age.) An estimated 22 percent of all restaurant meals are ordered through a car window in America, but other places, like Northern Ireland-where one in eight people are said to eat in the car at least once per week-are getting into the act too. McDonald's has added a second lane to hundreds of its restaurants in the United States in order to speed traffic, and at its new drive-throughs in China, dubbed De Lai Su (for "Come and Get It Fast"), the company is pitching retooled regional offerings like "rice burgers" to its burgeoning drive-through customers. Starbucks, which initially resisted the drive-through for its fast-food connotations, now has drive-throughs at more than half of its new company-owned stores. The "third place" that Starbucks espouses, the place for community and leisure between home and work, is, arguably, the car. on the label or in ads; by 2004, there were 504. Accordingly, the number of what the industry calls "on-the-go eating occasions" in the United States and Europe combined is predicted to rise from 73.2 billion in 2003 to 84.4 billion in 2008. Fast-food restaurants now clock as much as 70 percent of their sales at drive-through windows. (Early in our romance with the car, we used to go to "drive-in" restaurants, but those now seem relics of a gentler, slower age.) An estimated 22 percent of all restaurant meals are ordered through a car window in America, but other places, like Northern Ireland-where one in eight people are said to eat in the car at least once per week-are getting into the act too. McDonald's has added a second lane to hundreds of its restaurants in the United States in order to speed traffic, and at its new drive-throughs in China, dubbed De Lai Su (for "Come and Get It Fast"), the company is pitching retooled regional offerings like "rice burgers" to its burgeoning drive-through customers. Starbucks, which initially resisted the drive-through for its fast-food connotations, now has drive-throughs at more than half of its new company-owned stores. The "third place" that Starbucks espouses, the place for community and leisure between home and work, is, arguably, the car.

Traffic has even shaped the food we eat. "One-handed convenience" is the mantra, with forkless foods like Taco Bell's hexagonal Crunchwrap Supreme, designed "to handle well in the car." I spent an afternoon in Los Angeles with an advertising executive who had, at the behest of that same restaurant chain, conducted a test, in actual traffic, of which foods were easiest to eat while driving. The main barometer of success or failure was the number of napkins used. But if food does spill, one can simply reach for Tide to Go, a penlike device for "portable stain removal," which can be purchased at one of the more than twelve hundred (and growing) CVS drugstores that feature a drive-through window. The "audiobook," virtually unheard of before the 1980s, represents a business worth $871 million a year, and wouldn't you know it, "traffic congestion" gets prominent mention in sales reports from the Audio Publishers a.s.sociation. Car commuting is so entrenched in daily life that National Public Radio refers to its most popular segments as "driveway moments," meaning the listener is so riveted to a story they cannot leave their car. In Los Angeles, some synagogues have been forced to change the time of their evening services from eight p.m. to six p.m. in order to capture commuters on their way home, as going home and then returning to services is too much to bear in L.A. traffic. So much time is spent in cars in the United States, studies show, that drivers (particularly men) have higher rates of skin cancer on their left sides-look for the opposite effect in countries where people drive on the left.

Americans have long been fabled for their love of mobility. The nineteenth-century French visitor Alexis de Tocqueville wrote of millions "marching at once toward the same horizon," a phrase that springs to mind today when I'm flying over any large city and look at the parallel strings of red and white lights, draped like glittering necklaces over the landscape.

But this is not just a book about North America. While the United States may still have the world's most thoroughgoing car culture, traffic has become a universal condition, inflected with regional accents. In Moscow, the old images of Russians waiting in line have been replaced by images of idling cars stuck in heavy congestion. Ireland has seen its car-owners.h.i.+p rates double since 1990. The once tranquil Tibetan capital of Lhasa now has jams and underground parking garages. In Caracas, Venezuela, traffic is currently ranked "among the world's worst," thanks in part to an oil-fueled economic boom-and in part to cheap gas (as low as seven cents a gallon). In So Paulo, the wealthy shuttle between the city's more than three hundred helipads rather than brave the legendary traffic. In Jakarta, desperate Indonesians work as "car jockeys," hitchhikers of a sort who are paid to help drivers meet the pa.s.senger quota for the faster car-pool lanes.

Another traffic-related job has emerged outside Shanghai and other Chinese cities, according to Jian Shou w.a.n.g, the head of Kijiji (the eBay of China). There, one can find a new type of worker: Zhiye dailu, Zhiye dailu, or professional road guides, who for a small fee will jump into one's car and provide directions in the unfamiliar city-a human "nav system." But with opportunity comes cost. In China, the number of people being killed on the road every year is now greater than the total number of vehicles the country was manufacturing annually as recently as 1970. By 2020, the World Health Organization predicts, road fatalities will be the world's third-leading cause of death. or professional road guides, who for a small fee will jump into one's car and provide directions in the unfamiliar city-a human "nav system." But with opportunity comes cost. In China, the number of people being killed on the road every year is now greater than the total number of vehicles the country was manufacturing annually as recently as 1970. By 2020, the World Health Organization predicts, road fatalities will be the world's third-leading cause of death.

We are all traveling the same road, if each in our own peculiar way. I invite you to join me on that road as I try, over the din of pa.s.sing cars, to hear what traffic has to say.

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Why Does the Other Lane Always Seem Faster? How Traffic Messes with Our Heads Shut Up, I Can't Hear You: Anonymity, Aggression, and the Problems of Communicating While Driving HORN BROKEN. WATCH FOR FINGER.

-b.u.mper sticker

In Motor Mania, Motor Mania, a 1950 Walt Disney short, the lovably dim dog Goofy stars as "Mr. Walker," a model pedestrian (on two legs). He is a "good citizen," courteous and honest, the sort who whistles back at birds and wouldn't "step on an ant." Once Mr. Walker gets behind the steering wheel of his car, however, a "strange phenomenon takes place." His "whole personality changes." He becomes "Mr. Wheeler," a power-obsessed "uncontrollable monster" who races other cars at stop lights and views the road as his own personal property (but still "considers himself a good driver"). Then he steps out of his car, and, deprived of his "personal armor," reverts to being Mr. Walker. Every time he gets back into his car, despite the fact that he knows "how the other fellow feels," he is consumed by the personality of Mr. Wheeler. a 1950 Walt Disney short, the lovably dim dog Goofy stars as "Mr. Walker," a model pedestrian (on two legs). He is a "good citizen," courteous and honest, the sort who whistles back at birds and wouldn't "step on an ant." Once Mr. Walker gets behind the steering wheel of his car, however, a "strange phenomenon takes place." His "whole personality changes." He becomes "Mr. Wheeler," a power-obsessed "uncontrollable monster" who races other cars at stop lights and views the road as his own personal property (but still "considers himself a good driver"). Then he steps out of his car, and, deprived of his "personal armor," reverts to being Mr. Walker. Every time he gets back into his car, despite the fact that he knows "how the other fellow feels," he is consumed by the personality of Mr. Wheeler.

What Disney was identifying, in his brilliantly simple way, was a commonplace but peculiar fact of life: We are how we move. Like Goofy, I, too, suffer from this multiple personality disorder. When I walk, which as a New Yorker I often do, I view cars as loud, polluting annoyances driven by out-of-town drunks distracted by their cell phones. When I drive, I find that pedestrians are suddenly the menace, whacked-out iPod drones blithely meandering across the street without looking. When I ride a bike, I get the worst of both worlds, buffeted by speeding cars whose drivers resent my superior health and fuel economy, and hounded by oblivious pedestrians who seem to think it's safe to cross against the light if "only a bike" is coming but are then startled and indignant as I whisk past at twenty-five miles per hour.

I am guessing this sort of thing happens to you as well. Let us call it a "modal bias." Some of this has to do with our skewed perceptual senses, as I will discuss in Chapter 3. Some of it has to do with territoriality, like when bicyclists and pedestrians sharing a path yell at each other or someone pus.h.i.+ng a triplet-sized stroller turns into the pedestrian version of the SUV, commandeering the sidewalk through sheer size. But something deeper and more transformative happens when we move from people who walk to people who drive. The "personal armor" described by Disney is perhaps not so far-fetched. One study of pedestrian fatalities by French researchers showed that a significant number were a.s.sociated with a "change of mode"-for example, moving from car to foot-as if, the authors speculated, drivers leaving their vehicles still felt a certain invulnerability.

Psychologists have struggled to understand the "deviant driver," creating detailed personality profiles to understand who's likely to fall prey to "road rage." An early mantra, originally applied to what was called the "accident-p.r.o.ne driver," has long held sway: "A man drives as he lives." This is why car insurance premiums are tied not only to driving history but, more controversially, to credit scores; risky credit, the thinking goes, correlates with taking risks on the road. The statistical a.s.sociation between lower credit scores and higher insurance losses is just that, however; the reasons why how one lives might be linked to how one drives are less clear. And as inquiries into this question typically involve questionnaires, they're open to various self-reported response biases. How would you you answer this sample question: Are you a raving psychopath on wheels? (Please check "never," "sometimes," or "always.") Generally, these inquiries come to what hardly seem earth-shattering conclusions: that "sensation-seeking," "risk-seeking," "novelty-seeking," and "aggressive" individuals tend to drive in a riskier, more aggressive manner. You weren't going to bet your paycheck on daredevil drivers being the risk-averse people who crave quiet normalcy and routine, were you? answer this sample question: Are you a raving psychopath on wheels? (Please check "never," "sometimes," or "always.") Generally, these inquiries come to what hardly seem earth-shattering conclusions: that "sensation-seeking," "risk-seeking," "novelty-seeking," and "aggressive" individuals tend to drive in a riskier, more aggressive manner. You weren't going to bet your paycheck on daredevil drivers being the risk-averse people who crave quiet normalcy and routine, were you?

Even using a phrase like "road rage" lends a clinical legitimacy to what might simply be termed bad or boorish behavior elsewhere. "Traffic tantrums" is a useful alternative, nicely underscoring the raw childishness of aggressive driving. The more interesting question is not whether some of us are more p.r.o.ne to act like homicidal maniacs once we get behind the wheel but why we all all act differently. What is going on seems to have less to do with a change in personality than with a change in our entire being. In traffic, we struggle to stay human. act differently. What is going on seems to have less to do with a change in personality than with a change in our entire being. In traffic, we struggle to stay human.

Think of language, perhaps the defining human characteristic. Being in a car renders us mostly mute. Instead of complex vocabularies and subtle s.h.i.+fts in facial expression, the language of traffic is reduced-necessarily, for reasons of safety and economy-to a range of basic signals, formal and informal, that convey only the simplest of meanings. Studies have shown that many of these signals, particularly informal ones, are often misunderstood, especially by novice drivers. To take one example, the Reverend David Rowe, who heads a congregation in the wealthy Connecticut suburb of Fairfield and, improbably, is a great fan of the neopunk band Green Day, told me he was once driving down the road when he spotted a car with a Green Day b.u.mper sticker. He honked to show his solidarity. For his efforts he was rewarded with a finger.

Even formal signals are sometimes hazy: Is that person who keeps driving with their right turn signal on actually going to turn or have they forgotten it's still blinking? Unfortunately, there's no way to ask the driver what they mean. This may lead to a rhetorical outburst: "Are you going to turn or not?" But you can't ask; nor would there be a way to get an answer back. Frustrated by our inability to talk, we gesture violently or honk-a noise the offending driver might misinterpret. At some point you may have been the recipient of an unsolicited honk, to which you immediately responded with defensive anger-What?!-only to learn that the honker was trying to convey to you that you left your gas cap open. Thanks! Have a good one! Thanks! Have a good one!

Traffic is riddled with such "asymmetries" in communication, as Jack Katz, a sociologist at the University of California in Los Angeles and the author of How Emotions Work, How Emotions Work, describes them. "You can see but you can't be heard," he told me. "In a very precise way, you're made dumb. You can shout as much as you want but n.o.body's going to hear you." describes them. "You can see but you can't be heard," he told me. "In a very precise way, you're made dumb. You can shout as much as you want but n.o.body's going to hear you."

Another way to think about this "asymmetry" is that while you can see a lot of other drivers making mistakes, you are less likely to see yourself doing so. (A former mayor of Bogota, Colombia, had a wonderful solution to this, hiring mimes to people the city's crosswalks and silently mock drivers and pedestrians who violated traffic laws.) Drivers also spend much of their time in traffic looking at the rear ends of other cars, an activity culturally a.s.sociated with subordination. It also tends to make the communication one-way: You're looking at a bunch of drivers who cannot see you. "It's like trying to talk to someone who's walking in front of you, as opposed to someone who's face-to-face with you," Katz says. "We're looking at everybody's rear, and that's not how human beings were set up to maximize their communicative possibility."

This muteness, Katz argues, makes us mad. We are desperate to say something. In one study, in-car researchers pretended to be measuring the speed and distance perception of drivers. What they were really interested in was how their subjects would react to a honk from another driver. They made this happen by giving subjects instructions as they paused at a stop sign. They then had an accomplice pull up behind the stalled car and honk. More than three-quarters of the drivers reacted verbally, despite the fact they would not be heard by the honker.

When a driver is cut off by another driver, the gesture is read as rude, perhaps hostile. There is no way for the offending driver to indicate that it was anything but rude or hostile. Because of the fleeting nature of traffic, the act is not likely to be witnessed by anyone else. No one, save perhaps your pa.s.senger, will shake their heads in unison with you and say, "Can you believe he did that?" There are at least two possible responses. One is to speed ahead and cut the offending driver off in turn, to "teach them a lesson." But there is no guarantee that the person receiving the lesson is aware of what they have done-and so your lesson simply becomes a provocation-or that they will accept your position as the "teacher" in any case. And even if your lesson is successful, you're not likely to receive any future benefit. Another response is to use an "informal" traffic signal, like the middle finger (or, as is gaining currency in Australia, the pinkie, after an ad campaign by the Road and Traffic Authority to suggest that the person speeding or otherwise driving aggressively is overcompensating for deficient male anatomy). This gains power, Katz says, if the person you give the finger to visually registers that you're giving him the finger. But what if that person merely gives the finger back?

Finally, it is often impossible to even send a message to the offending driver in the first place. Yet still we get visibly mad, to an audience of no one. Katz argues that we are engaging in a kind of theatrical storytelling, inside of our cars, angrily "constructing moral dramas" in which we are the wronged victims-and the "avenging hero"-in some traffic epic of larger importance. It is not enough to think bad thoughts about the other driver; we get angry, in essence, to watch ourselves get angry. "The angry driver," Katz argues, "becomes a magician taken in by his or her own magic." Sometimes, says Katz, as part of this "moral drama," and in an effort to create a "new meaning" for the encounter, we will try to find out something after the fact about the driver who wronged us (perhaps speeding up to see them), meanwhile running down a mental list of potential villains (e.g., women, men, teenagers, senior citizens, truck drivers, Democrats, Republicans, "idiots on cell phones," or, if all else fails, simply "idiots") before finding a suitable resolution to the drama.

This seems an on-road version of what psychologists call the "fundamental attribution error," a commonly observed way in which we ascribe the actions of others to who they are; in what is known as the "actor-observer effect," meanwhile, we attribute our own actions to how we were forced to act in specific situations. Chances are you have never looked at yourself yourself in the rearview mirror and thought, "Stupid #$%&! driver." Psychologists theorize that the actor-observer effect may stem from one's desire to feel more in control of a complex situation, like driving in traffic. It also just might be easier to chastise a "stupid driver" for cutting you off than to fully a.n.a.lyze the circ.u.mstances that caused this event to occur. in the rearview mirror and thought, "Stupid #$%&! driver." Psychologists theorize that the actor-observer effect may stem from one's desire to feel more in control of a complex situation, like driving in traffic. It also just might be easier to chastise a "stupid driver" for cutting you off than to fully a.n.a.lyze the circ.u.mstances that caused this event to occur.

On a larger scale, it might also help explain, more than actual national or civic chauvinism, why drivers the world around have their own favorite traffic targets: "The Albanians are terrible drivers," say the Greeks. "The Dutch are the worst drivers," say the Germans. It's best not to get New Yorkers started about New Jersey drivers. We even seem to make the fundamental attribution error in the way we travel. When bicyclists violate a traffic law, research has showed it is because, in the eyes of drivers, they are reckless anarchists; drivers, meanwhile, are more likely to view the violation of a traffic law by another driver as somehow being required by the circ.u.mstances.

At least some of this anger seems intended to maintain our sense of ident.i.ty, another human trait that is lost in traffic. The driver is reduced to a brand of vehicle (a rough stereotype at best) and an anonymous license-plate number. We look for glimpses of meaning in this sea of anonymity: Think of the curious joy you get when you see a car that matches your own, or a license plate from your home state or country when you are in another. (Studies with experimental games have shown that people will act more kindly toward someone they have been told shares their birth date.) Some drivers, especially in the United States, try in vain to establish their ident.i.ties with personalized vanity plates, but this raises the question of whether you really want your life summed up in seven letters-let alone why you want to tell a bunch of people you don't know who you are! Americans seem similarly (and particularly) predisposed to putting cheap b.u.mper stickers on their expensive cars-announcing the academic wizardry of their progeny, jocularly advising that their "other car is a Porsche," or giving subtle hints ("MV") of their exclusive vacation haunts. One never sees a German blazing down the autobahn with a PROUD TO BE GERMAN PROUD TO BE GERMAN sticker. sticker.

Trying to a.s.sert one's ident.i.ty in traffic is always going to be problematic, in any case, because the driver yields his or her ident.i.ty to the cars. We become, Katz says, cyborgs. Our vehicle becomes our self. "You project your body way out in front of a vehicle," says Katz. "When somebody's changed lanes a hundred yards ahead, you instantly feel you've been cut off. They haven't touched you physically, they haven't touched your car physically, but in order to adjust the wheel and acceleration and braking, you have projected yourself." We say, "Get out of my way," not "Get out of my and my car's way."

Ident.i.ty issues seem to trouble the driver alone. Have you ever noticed how pa.s.sengers rarely seem to get as worked up about these events as you do? Or that they may, in the dreaded case of the "backseat driver," even question your part in the dispute? This may be because the pa.s.senger has a more neutral view. They do not feel that their ident.i.ty is bound up with the car. Studies that have examined the brain activity of drivers and pa.s.sengers as they engaged in simulated driving have shown that different neural regions are activated in drivers and pa.s.sengers. They are, in effect, different people. Studies have also shown that solo drivers drive more aggressively, as measured by such indices as speed and following distance. It is as if, lacking that human accompaniment-and thus any sense of shame-they give themselves over to the car.

Like many everyday travails, this whole situation is succinctly ill.u.s.trated in a hit country song, Chely Wright's "The b.u.mper of My S.U.V." The song's protagonist complains that a "lady in a minivan" has given her the finger because of a United States Marines Corps b.u.mper sticker on her SUV. "Does she think she knows what I stand for / Or the things that I believe," sings Wright, "just because the narrarator has a b.u.mper sticker for the U.S. Marines on the aforementioned b.u.mper of her S.U.V.?" The first issue here is the struggle over ident.i.ty; the narrator is upset that her ident.i.ty has been defined by someone else. But the narrator may be protesting too much: How else else would we know the things that you stand for or believe if you did not have a b.u.mper sticker on your SUV? And if you are resentful at having your ident.i.ty pigeonholed, why put a pigeonholing sticker on your b.u.mper in the first place? would we know the things that you stand for or believe if you did not have a b.u.mper sticker on your SUV? And if you are resentful at having your ident.i.ty pigeonholed, why put a pigeonholing sticker on your b.u.mper in the first place?

In the absence of any other visible human traits, we do draw a lot of information from b.u.mper stickers. This point was demonstrated by an experiment conducted in 1969 at California State College, a place marked by violent clashes between the Black Panther Party and the police. In the trial, fifteen subjects of varying appearance and type of car affixed a bright BLACK