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The utility of switching lanes when stuck in traffic

blogs.reuters.com

11–20 of 62 posts

Re: The utility of switching lanes when stuck in traffic

#11
> This is important: the really painful part of being stuck in traffic is not, really, the actual amount of time that it takes to get from Point A to Point B. Rather, it’s the “stuck” bit.

I've noticed this tends to not matter so much if you're not the one driving, more so if you're in the backseat. Self-drive cars anyone?

Re: The utility of switching lanes when stuck in traffic

#12
post #7
post #2

He should also test switching to the slower-looking lane in anticipation of others switching to the faster-looking lane.

I often find that by moving right I pass a TON of people who shifted left in anticipation of heavy traffic ahead.. left lanes back up, right lanes open up.

If I'm not in a hurry I go to the left so I don't feel like I have to monitor quick-cutters from two directions and it makes the whole drive easier. If I'm in a hurry I consider each lane like its own Slinky, expanding and contracting; my method is after my lane has a good run where I'm passing others, I switch to any other lane and hope to catch it in the right Slinky stage.

Seems to work better than sticking with a lane. Probably just the placebo effect, but I'll take it.

Re: The utility of switching lanes when stuck in traffic

#13
The philosopher Nick Bostrom has an interesting view about this question, based on the selection effect[1]: if you consider your presence in the traffic as a random sample from "observation acts", then you are more likely to be in the wrong lane (and hence would benefit from switching), simply because it is denser, i.e. it entails a higher probability mass for obversations of that type.

[1] http://plus.maths.org/content/cars-next-lane-really-do-go-fa...

Re: The utility of switching lanes when stuck in traffic

#14
post #10
post #8

Earlier quoted context omitted.

Regardless of their perceptions or actual travel speeds, the lane-switchers could be providing a much needed liquidity between the more dynamic right lanes (with entrances and exits) and the more static left lanes. Perhaps it's in doing so that they unwittingly ensure that everyone arrives at the same time. (Although it's almost certainly not the optimal time…)

I was thinking the opposite - lane switchers cause "turbulence" in the flow and hence contribute to slowing everyone down.

Replace "lane switchers" with "high frequency traders" and this debate reads just as intelligibly.

Re: The utility of switching lanes when stuck in traffic

#15
post #8
post #6

Earlier quoted context omitted.

It kinda does actually. It speaks to the fact that perception of moving faster does not match reality.

Regardless of their perceptions or actual travel speeds, the lane-switchers could be providing a much needed liquidity between the more dynamic right lanes (with entrances and exits) and the more static left lanes. Perhaps it's in doing so that they unwittingly ensure that everyone arrives at the same time. (Although it's almost certainly not the optimal time…)

I'm always torn between the idea of liquidity or turbulence. Intuitively, turbulence makes sense, but then what happens to facilitates people in the left lane exiting at their destination?

I'd love to see some work done to figure this out.

Re: The utility of switching lanes when stuck in traffic

#16
post #8
post #6

Earlier quoted context omitted.

It kinda does actually. It speaks to the fact that perception of moving faster does not match reality.

Regardless of their perceptions or actual travel speeds, the lane-switchers could be providing a much needed liquidity between the more dynamic right lanes (with entrances and exits) and the more static left lanes. Perhaps it's in doing so that they unwittingly ensure that everyone arrives at the same time. (Although it's almost certainly not the optimal time…)

I've assumed similar things, though I recognize the 'turbulence' argument below. In general, it does seem that as one lane slows down a bunch of people jump to the faster lane, quickly slowing that one down.

Regardless, for me the best strategy is to almost never switch lanes. Even when I do switch, 15 minutes later I see somebody that I had passed earlier zipping by me in another lane. There is no value in switching for me that I can determine, and my commute is much more pleasant when I stop thinking about how to get one car length ahead. Whether the lane switchers improve efficiency or reduce it doesn't change that equation for me.

I said 'almost never'. There are a few places on my commute where free lanes are predictable - everyone is merging right to try to get to get onto some interchange, that so several lanes back up, while the people who are trying to stay on the same road can move left and travel quickly. But even then, what are you optimizing for? Maybe 15seconds? Sure, it is more than that in the moment, as you can sit in the slow lanes for a few minutes, but all you do if you move left is rush ahead to the next back up.

Re: The utility of switching lanes when stuck in traffic

#17
I will only switch lanes when I can see what is causing the blockage. If it's an accident to one side, I get to the other. This avoids the mess of merging at the last minute.

Having tested this by noting the positions of large distinct trucks that I can see form a distance, I've noticed that I do get through the jam faster this way.

Re: The utility of switching lanes when stuck in traffic

#18
post #7
post #2

He should also test switching to the slower-looking lane in anticipation of others switching to the faster-looking lane.

I often find that by moving right I pass a TON of people who shifted left in anticipation of heavy traffic ahead.. left lanes back up, right lanes open up.

Also, I find that truck drivers have a preference for maintaining a consistent low speed, rather than doing stop/start all the time. So I like to get in the slow lane with them, switch to a low gear, and drive using only the accelerator, losing imaginary good-driving points every time I have to touch the brake. Slower or faster overall? Meh. It's a lot less work/stress, which is a good trade as far as I'm concerned.

Re: The utility of switching lanes when stuck in traffic

#20
post #19

What I do in crawling traffic is stay in 1st gear at a steady pace and stay in the same lane to reduce the annoyance of starting & stopping so much. You'll notice that large semi trucks do this too. It really benefits everyone if more people did this.

The hardest part about that is remaining sane as idiots cut in front and undermine this strategy
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