[deftturtle]

My solution is to have a blinking green, which indicates that it’s about to turn yellow. We might also lengthen the yellow duration, but knowing that the light will switch gives time to decide if you can speed up or decelerate safely, without wasting energy.

I’d be very curious to see how a blinking green system plays out in tests.

Another thought: if we manage traffic like regulating fluid flow and pressure, we could avoid situations where a single car exiting a parking lot shuts down the highway instantly. That single car should have to wait maybe 5-10 seconds before triggering the lights, and the blinking green would let highway drivers adjust. Forcing 20 cars to rapidly stop for an already stopped car makes no sense.

As the single car waits, pressure “builds” so to speak, and eventually the light decides that the fluid flow should change.