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this post was submitted on 13 Mar 2024
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I agree on everything, but the conclusion that they are a pro and a con.
Under the constraint, that the same rules apply to bicycles and cars and they are enforced, then traffic lights are definitely an anti-pattern.
Under the assumption, that the alternative would be that pedestrians and cyclicsts would have always the right of way over cars in an urban environment, they would be neutral.
But are they ever a good thing? I see where you are coming from with this: Traffic lights make cars wait. But they are installed to optimise car-flow, in the first place. So, if they were not there, cars would wait longer, because they are inherently inefficient vehicles that would clogg up intersections immediatly and consequentially bring car-flow to a total halt. Hence, every traffic not participating in car-flow would drastically accelerate if traffic lights were abolished.
I think the top purpose is safety and from there it’s an attempt at optimization. Or perhaps those priorities are flipped. But if you consider Europe which largely favors traffic circles over lights, that’s probably the optimum for keeping cars moving. If I were a selfish car driver in the US, I would want probably ~70% of the traffic lights at all the low-flow intersections to be replaced with traffic circles.
I suppose it won’t be long before this discussion becomes moot. People on their tablets in self-driving cars won’t care whether the car is moving or not.