[Yo-Yo]

I have heard proposals to put green lights on the BACK of a vehicle that come on when the driver is pressing on the gas. It goes out when the driver coasts, and of course the traditional red lights come on when the driver brakes. This would allow following vehicles to know what the driver up front is doing, and provide a warning that the driver may be coasting in preparation for braking.

I have also heard proposals for the brake lights to flash in proportion to how hard the driver is braking. That is, if the brakes are lightly applied, the brake lights (or just the high center-mounted brake light) flashes slowly. As the driver applies more brake pressure, the light(s) flash faster and faster, and are solidly lit with full brake pressure. This, too, would provide more information to following drivers to know how hard the car in front is applying the brakes and anticipate accordingly.

I have never, ever before heard of this proposal to put Green brake lights on the front of a vehicle. To me, Green means "Go," not stop, and would cause more confusion than lessen potential collisions.

However, I think all of these proposals are outdated with today's cars with active collision avoidance radar installed.

[Melinator2]

well in this case, if you think about it, green does mean go, so the observer is not misinformed.

[Clay Moore]

I have seen a few people running the multi-flash brake lights in local traffic. It is distracting to have a single vehicle in traffic with these due to the increase in processing that it adds.

I can’t imagine being in a 50 vehicle pile of slow and merging traffic with multi flash brake lights.

[MV=PY]

"However, I think all of these proposals are outdated with today's cars with active collision avoidance radar installed."

It won't be long before machines are driving every vehicle and talking to each other to coordinate (missing each other by inches). No more lights needed at all then.