[SapporoChris]

I believe traffic lights currently use three bulbs, red, yellow and green. Even without color a computer system can easily determine when each light is lit.

If there are single bulbs displaying red, green and yellow please give clear examples.

[bluGill]

Flashing lights over rural intersections often do that. There is only one color there (yellow or red), but position is not a signal

[dham]

Have you driven in America? We have the craziest lights you've ever seen. And that's just in my state

[dzhiurgis]

How about turn signal vs brake lights?

[JumpCrisscross]

> How about turn signal vs brake lights?

Potentially as extraneous as range to a surface that a camera can’t tell apart from background.

More to the point, everyone but Tesla is doing cameras plus Lidar. It’s increasingly looking like the correct bet.