this post was submitted on 21 Oct 2023
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I saw a good article on c/upliftingnews about AI improving traffic signal controllers. It's good and all, I just can't help but think of the "look at what they need to have a fraction of our power" meme while reading it

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[–] skullgiver@popplesburger.hilciferous.nl 18 points 1 year ago* (last edited 11 months ago) (7 children)

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[–] Cralder@feddit.nu 6 points 1 year ago (1 children)

Roundabouts are great but it's expensive to convert a crossing to a roundabout, not to mention difficult since the traffic needs to be rerouted during construction. In the most congested areas it's almost impossible, which is ironically where it is needed the most

[–] jeff_hykin@lemmy.world 5 points 1 year ago* (last edited 1 year ago)

Additionally (I still love roundabouts) there can be a max-wait-time problem when there is heavy traffic in one direction.

If a basketball game ends there can be 20,000 cars bumper-to-bumper trying to leave. Let's say (looking at a map) they're going left-to-right through an intersection.

If there's 1 car trying to go top-to-bottom...

  • If the intersection is a stoplight it doesn't matter. Even if there were 20 million left-to-right cars; it's still a 5 or 10min wait for the top-to-bottom car.
  • If the intersection was a stop sign it also doesn't matter; it'll be the left-to-right cars turn then the top-to-bottom cars turn
  • At a roundabout though (at least in the US), vehicles entering on the left always take priority over vehicles entering from the bottom. So the top-to-bottom guy could be there all night

Game days on my campus can cause a 2 hour wait on a 1 mile road. My campus is unusual, but just FYI absolutely insane wait times do happen regularly in some cities.

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