Eliminating Traffic Waves

I don’t know about you guys, but I’ve always found traffic very fascinating because of its complexity. This is a really interesting post on how someone was able to eliminate persistent traffic waves by keeping a large distance in front of him and just consistently driving the average speed. This was able to wipe out the traffic stall for everyone behind him. This is really interesting to me because a lot of times traffic waves develop and slow down traffic because of an accident or something, but remain there long after everything is long gone. Boughter once told me about his theory of preventing traffic by not braking, and this seems along the same lines, but goes a bit further by trying to maintain a constant speed.

The other thing he talks about is that some traffic is just created because people are trying to get across to an exit lane. Because people close up gaps in front of them so that people can’t cut in front, a car who is trying to merge is forced to hold up traffic in both lines in order to get across. By keeping space and allowing people to merge gracefully, traffic is much improved–the people who need to get off the highway can get off and the traffic is lighter for everyone who’s staying on.

Traffic Wave Experiments

kg at 11:26 am on Sunday, November 26, 2006

9 Comments

326

Comment by joe

November 26, 2006 @ 1:58 pm

I like!

328

Comment by Jeff

November 26, 2006 @ 9:50 pm

i cant help but think that my accident would have been prevented by this concept. damn you los angeles!

329

Comment by Boughter

November 27, 2006 @ 10:48 am

dude, that’s exactly what my sister and I say! Doesn’t work as well as the guy said though. The second you’re in traffic in Southern California, if you leave more than a 2 car buffer that buffer will be filled in a few moments, forcing you to brake now that you can’t coast forward.

But if everyone would just slow down a bit during congestion, and not brake, the entire problem would be solved. Its that little tap of the brake because someone cut someone off that turns into a dead stop two miles behind him/her.

332

Comment by kg

November 27, 2006 @ 12:01 pm

Well, he actually talks about the buffer thing… He says that it’s true that some cars will try to weave into every single space available. But other cars won’t. And once the cars that are trying to weave are gone, the cars that aren’t weaving will form a barrier which will prevent other people from weaving in. Which makes sense to me.

336

Comment by joe

November 29, 2006 @ 12:20 am

I go between both sides, weaving and average-maintaining. I generally try to maintain average speed, but sometimes I weave, depending on traffic flow, location, where I’m going, etc. When I’m weaving, I HATE HATE HATE how cars make a barrier you can’t get through. But that’s shortsighted of me because weaving still makes the rest of the road worse behind me. Shrug.

339

Comment by kg

November 29, 2006 @ 11:41 am

Weaving’s pretty much just a jerk thing to do.

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Comment by joe

November 29, 2006 @ 6:42 pm

it’s cool when you do it right, where right involves affecting those around you as little as possible. You can’t pop right in front of somebody because even though you could they’ll be like WHOA and hit their brakes. Gotta have plenty of room behind you so they don’t wig out. As long as you do that you just move where there’s holes. Also the traffic has to be light, you can’t do it in proper dense traffic. Which is why I only go through LA when it’s dark. Because dense traffic sucks.

347

Comment by cody

November 30, 2006 @ 4:24 pm

weaving is fun in slo. but thats probably because theres no traffic on the highways here :)

352

Comment by kg

November 30, 2006 @ 9:47 pm

Yah, I weave there just to take the inside of a curve…

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