Four-way lights suck and if the cars can talk to each other and are fully autonomous why can’t we get rid of lights.
Let’s Talk About Self-Driving Cars
Artur Kiulian

Instead of lights being in control of traffic as they are now, traffic will be in control of lights, and lights will shift to being responsive to traffic.

However, lights won’t go away for a very long time (if ever), because the idea that manual driving will become illegal is ridiculous, and the 20% (guessing) of manual vehicles that will persist will require lights.

I do think it reasonable to suggest that traffic lights will migrate to the manually driven vehicle’s dashboard, so that only the people who need the information have it.

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