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Old 06-25-2022, 11:26 PM   #12419
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That is the goal but I think we are discussing congested traffic.
I saw an interesting phenomena once. It was on a freeway, 110 km/h speed limit, north of Sydney. There was a group of really slow moving cars, 40 km/h? I have no idea what the cause of this was but it meant that cars catching up to this group of cars had to slow down to 40 km/h too. The cars that reached the front of the group could speed up again to the speed limit. So this gaggle of slow moving cars kept on regenerating.
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Old 06-25-2022, 11:47 PM   #12420
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I saw an interesting phenomena once. It was on a freeway, 110 km/h speed limit, north of Sydney. There was a group of really slow moving cars, 40 km/h? I have no idea what the cause of this was but it meant that cars catching up to this group of cars had to slow down to 40 km/h too. The cars that reached the front of the group could speed up again to the speed limit. So this gaggle of slow moving cars kept on regenerating.
It's a joy to share the road with those who have a sense of, and respect for the rhythm of traffic. It's equally annoying to be trapped by those who don't.
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Old 06-26-2022, 10:12 AM   #12421
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Originally Posted by Captain Snooze View Post
I saw an interesting phenomena once. It was on a freeway, 110 km/h speed limit, north of Sydney. There was a group of really slow moving cars, 40 km/h? I have no idea what the cause of this was but it meant that cars catching up to this group of cars had to slow down to 40 km/h too. The cars that reached the front of the group could speed up again to the speed limit. So this gaggle of slow moving cars kept on regenerating.
That's called wave propagation.
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Old 06-26-2022, 03:10 PM   #12422
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Old 06-26-2022, 05:16 PM   #12423
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That's it!! This is what I saw!! Thanks for posting.

A quick search reveals pages and pages on the subject. I'm off to the TIL thread to record this.
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Old 06-26-2022, 05:35 PM   #12424
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i actually learned it on a mythbusters traffic episode, but i think their content is all paywalled
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Old 06-26-2022, 06:10 PM   #12425
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Never seen them put cars out that close together on the auto X course before.
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Old 06-26-2022, 06:56 PM   #12426
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Never seen them put cars out that close together on the auto X course before.
It's Briton. They don't have the space we do.
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Old 06-26-2022, 07:31 PM   #12427
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Never seen them put cars out that close together on the auto X course before.
This is what you get for not walking the course first.
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Old 06-26-2022, 11:51 PM   #12428
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i actually learned it on a mythbusters traffic episode, but i think their content is all paywalled
That's a brilliant demonstration you shared.
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Old 06-27-2022, 12:02 AM   #12429
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Old 06-27-2022, 09:21 AM   #12430
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Everyone trying to merge at the same point in the road actually slows down traffic on average. The most efficient merge happens when both lanes are moving at the same speed. The most efficient traffic flow occurs when acceleration (+ and -) is minimized. The "right" thing to do is to gradually decrease speed until both lanes match and then merge to the through lane, rather than blast up to the merge then cut in like an ass.



The point isn't to optimize the space taken by the cars. That's called gridlock in some places.



The point is to optimize the average rate of passage.
This is the common misconception.

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Old 06-27-2022, 10:59 AM   #12431
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Originally Posted by Captain Snooze View Post
I saw an interesting phenomena once. It was on a freeway, 110 km/h speed limit, north of Sydney. There was a group of really slow moving cars, 40 km/h? I have no idea what the cause of this was but it meant that cars catching up to this group of cars had to slow down to 40 km/h too. The cars that reached the front of the group could speed up again to the speed limit. So this gaggle of slow moving cars kept on regenerating.
This is a rule or something in Atlanta. People will drop below 50mph on a highway that's 65mph for no apparent reason. It seems to happen in certain spots on certain roads.

I blame all the transplants. Almost no one that lives here is from here anymore.
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Old 06-27-2022, 11:36 AM   #12432
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This is a rule or something in Atlanta. People will drop below 50mph on a highway that's 65mph for no apparent reason. It seems to happen in certain spots on certain roads.

I blame all the transplants. Almost no one that lives here is from here anymore.
I like when the idiots drop to 5-10 under the limit when they see a cop just sitting there in the median not having anybody pulled over.
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