Go Play In Traffic! An Introduction to Traffic Game Theory by Patrick G. Salsbury (salsbury@sculptors.com) I don't know who you are. I don't know where you are. I don't even know where you're going. But I'm sure of one thing - you've probably got better places to be than sitting in the middle of a traffic jam. For almost four years, I've been driving around the San Francisco Bay Area studying traffic patterns. I've seen how they work, how people act & react, and have been figuring out ways to break up traffic jams to get things flowing smoothly again. Though it may often seem frustrating, you can actually have quite a bit of fun in traffic, if you approach it from a fun perspective. I'd like to introduce you to a concept that I call "Traffic Game Theory." That is, the idea that when you're driving down the road, you're playing a game with all of the other drivers. Each one is trying to get to their destination, each is making "moves", and most don't even realize that they're in a game. They're playing, but they aren't really enjoying themselves because they don't KNOW that they're playing, so they forget to have fun. The rules of this game are easy to learn, simple to do, and produce fairly quick results. They also make the commute more enjoyable; for you, and for others (if you're successful in breaking the jam). When you win, everyone wins. When you lose...you stay stuck in the jam. --------------- "Traffic Busting" (Basic Rule Set) *Please note:* The rules are designed in such a way as to be easy to remember, *ONCE YOU UNDERSTAND THE CONCEPTS BEHIND THEM*. They may not be intuitive by just reading the one-liners themselves, though. Please be sure you study them carefully, or it will affect your performance in the game. RULE #1) IGNORE THE SPEED LIMIT SIGNS. -------------------------------------- This does not necessarily imply that you should ignore the speed _limit_, (and DEFINITELY not the other cars around you!) However, when traffic is moving along at a speedy 15 mph, signs saying "Speed Limit 55" aren't particularly useful. Likewise, if everyone else is clipping along at 65-70, someone doing 55 is likely to at least annoy others nearby, and may pose a road hazard. ...So forget about the signs. They're just pieces of metal, and you're a lot smarter than they are. Pay attention to your surroundings, and the other players near you. RULE #2) GIVE YOURSELF SOME BREATHING ROOM. ------------------------------------------- The secret to jam-free driving is S-P-A-C-E. When no one is on the road at 2am, you could open it up if you wanted to and not worry about hitting anyone. At 8:30am on a weekday, however, the roads are often packed to a standstill. It's the same road. What's the difference? The amount of space around each car. Your Driver's Education teacher probably talked about putting a "space cushion" around your car. In a jam, you want to make one for yourself. When traffic starts to move, let the car ahead of you go for an extra second or two. You can't easily control how close the guy behind you gets, but it's VERY easy to open up some space in front of you. In the this game, space acts sort of like "points" do in other games. You can create or "earn" space, which you may "spend" later, whenever you need it. RULE #3) STOP THINKING ABOUT YOURSELF ALL THE TIME. --------------------------------------------------- How many times have you seen some space open up in front of someone, then watched the driver speed up to 20 or 30 mph for about 4 seconds...and slam on their brakes again? This person is only thinking about themself, not the traffic around them. As a "Traffic Buster," you may have to do their thinking for them, since they seem to be on autopilot. Pay close attention to the speed of the cars around you (as per Rule #1). When space opens up in front of you, maintain it...INCREASE it! Don't rush to fill it up. Space is a valuable commodity on a choked road, and if you spend it wisely, you, and all the people around you, can be zipping along at normal speeds in just a couple of minutes. (I can usually get things going fairly well within 5 minutes, and that's just my one car. What happens when the rest of you start actively fighting traffic jams, too?) RULE #4) TRICK OTHER DRIVERS INTO DOING THINGS YOUR WAY. -------------------------------------------------------- It may sound sneaky and underhanded, but it works. :-) Remember, this *IS* a game. You can play whenever you're on the road, and if you win, you'll get to wherever it is that you're going a lot sooner than if you don't play. It's your choice... Remember that guy on autopilot? Well, he's on "The Other Side" in this game. If you're a "Traffic Buster" then he's a "Traffic Jammer". You can, however, get him to do what you want. Here's how it works: As traffic starts to move, and you open up that "space cushion" in front of you (as per Rule #2), the car ahead of you is accelerating away from you. You are accelerating too, but not _quite_ as fast as him, so the space is slowly getting bigger. The people behind you aren't likely to get annoyed if they don't have to play "Stop & Go" every 5 seconds, so give yourself some breathing room. As the space opens up to a couple of car-lengths...maybe 2, perhaps even 6 or 7 (it varies based upon the other players on the road), eventually, one of the autopilot people in an adjacent lane sees that nice, big, open space in front of you. Even if it's only 20 feet, they just can't STAND to see prime real estate like that sit around unused, so they dart into it. ("Nature abhors a vacuum", as they say.) At this point, several things happen at once, so you've really got to pay close attention: -At least one of the autopilot people will move into the space in front of you. Sometimes you can get more, but at least one ALWAYS takes it. -When this person moves into the space you've created, they leave another lane. Congratulations! You've just opened up space in a traffic lane that you're not even driving in! This is what I call "Seeding a traffic jam"; like when pilots "seed" clouds in order to get them to start raining. You're relieving pressure in these other lanes, inserting space, and now the people over there can begin to speed up just a little bit, so the whole jam is benefitting by gaining some forward space and motion, not just your lane. -The driver of the car that just moved in front of you is probably about to slam on their brakes and start jamming traffic again. (See Rule #3) But if you know this in advance (and you _do_), you can plan ahead for it, and make sure that they _don't_ slow down traffic. This technique is explained in Step 5. -Now it's time to start the process all over again, and to make sure that the autopilot person who just moved ahead of you doesn't undo all of your work. (Remember, he's playing on "The Other Side.") RULE #5) LAY OFF THE BRAKES. ---------------------------- It may sound strange, but it's true: Every time you hit your brakes, you're sending a signal back to the people behind you. That signal says "I don't know what's going on up here. I'm not really in control of the situation, so I'm slowing down, and you should, too." Most of the people on autopilot are just playing "follow the leader." The person ahead moves forward, so they move forward. The person ahead hits the brakes, so they hit the brakes. Ho hum. These are the same people who are packing their cars together approximately 2 feet from each other and causing the jam. Why should you act like them? Who in their right mind would drive at 55 mph just 2 feet behind another car? Not me...not you...and apparently, not them, either. So everyone putts along at 5 mph, not thinking to just insert some space into the jam. They must be hoping that someone else will end the jam for them. If you look far ahead of you on the road, as far as you can see, you can watch a brake-light signal being transmitted down the car line towards you. If you've inserted enough space in front of your car during the game, you can watch the Traffic Jammer's signal come up to you, and REFUSE TO TRANSMIT IT TO THE PERSON BEHIND YOU. (Why send a message that will help prolong the jam?) Use engine-braking or coasting to try and absorb some of that open space ahead of you *without* using the brakes. Only use them if you start to get close and really need to slow down. Every time you hit that petal, you're broadcasting "STOP!" to the people behind you, and most of them will pass it on down the line. Sometimes for miles... If you've been paying attention, and you're aware of that Jammer signal coming at you, you'll have already prepared. You'll have built up your space, and you can "spend" it on yourself while coasting towards the people in front of you. If you time things right, the people in front of you will have started moving again by the time you get there, and you can just start inserting space again. (Rule #2) You've never touched the brakes, and the people behind you haven't been passed the Jammer signal, so traffic keeps flowing along smoothly back there. Sometimes things don't time out quite right, and you _do_ have to stop, but if you "spend" your saved-up space wisely, chances are you'll only spend 3-5 seconds stopped instead of 20-30. ------------------------------------------------------------------------------ You've seen the standing waves on the road. We all have. Those spots where everybody has to stop, even though there's nothing wrong there. Those slow or stopped spots can last for hours, sometimes. Using the above techniques, you can absorb some of those waves, break up the stationary nodes, and get traffic flowing smoothly again. Do you ever notice the jams that end immediate AFTER accident sites? Everyone slows down to see what's going on, and by the time they look up from the accident scene, the person ahead of them has sped up, leaving them with... (you guessed it)...LOTS OF SPACE! Now it's their turn to speed up. There's no one slowing them down from the front, so there's no traffic jam starting after the accident. This is exactly the sort of space I'm suggesting you insert into the _middle_ of jams. And while you're at it, DON'T SLOW DOWN TO LOOK AT ACCIDENTS. If you do, you'll probably annoy other people just as much as they annoy you. :) ------------------------------------------------------------------------------ So, in quick summary: #1) IGNORE THE SPEED LIMIT SIGNS. (Pay attention instead to what's happening around you.) #2) GIVE YOURSELF SOME BREATHING ROOM. (Space is your "money" in this game. Save it up, and spend it wisely.) #3) STOP THINKING ABOUT YOURSELF ALL THE TIME. (Don't be an Autopilot/Jammer! Watch the other players as they move.) #4) TRICK OTHER DRIVERS INTO DOING THINGS YOUR WAY. (Let them go ahead of you, while you open up space in their old lane.) #5) LAY OFF THE BRAKES. (No need to transmit their signals for them...right?) Just five simple rules. You can count them on one hand. ------------------------------------------------------------------------------ The object of this game is to get you to wherever it is that you're going, as quickly as possible. That won't happen by speeding up to 30mph for 4 seconds, then sitting at a standstill for 45 seconds. It will only happen if the jam clears up. This whole thing may sound a bit strange, but I've been studying this for a long time, and it _does_ work. There are identifiable phenomena going on. If you recognize the various "moves" that are happening, you'll be better able to plan your moves, and will become a better player, and a better driver. I'm sure that the next time you're sitting there, in the middle of a jam, you'll remember at least SOME of these techniques. Maybe you'll even give them a try. After all, what have you got to lose? Certainly not time. That's what you win if you spend your space correctly and clear the jam. Oh, and REMEMBER TO HAVE FUN! :-) That's *also* the point of games. It's certainly a lot more fun for me when I'm breaking up a jam than when I'm just stuck in the middle of one. I hope you'll find the same is true for you, too. It will be nice to have some more players out there "jam-busting". _Somebody_ has to do it, right? Now you know how. ;^) Pat For More Info: My friend, Daniel Adinolfi, recently pointed me to http://www.amasci.com/amateur/traffic/traffic1.html which has more info, diagrams, and cool little animations to demonstrate the fine points of busting up traffic jams. This is a HIGHLY recommended site for the serious traffic-buster. Another traffic sculptor is Bob van de Walle, who also lives in the Bay Area, and actively works to break up traffic jams. Check out his pages at: http://drive-with-grace.org/ Most recent update: 12/05/02 ------------------------------------------------------------------------------ Patrick Salsbury is a Design Scientist living in the San Francisco Bay Area. He works on creating solutions for social problems such as traffic congestion, homelessness, poverty, and poor education. He can be reached by: Email: salsbury@sculptors.com Snail: Reality Sculptors Attn: Patrick Salsbury 309 Cedar Street #23C Santa Cruz, CA 95060 ------------------------------------------------------------------------------ A final word: Feel free to redistribute this (non-commercially, intact, and with proper credit, please) wherever you think it would be of help. Please contact me beforehand if you wish to reprint it in a commercial publication. Such permission will most likely be granted liberally.