Patentable solution.
But you will notice the yellow/red light problem is independent of speed. Whether the vehicle speed is 5 mph or 50 mph, a fair amount of vehicles eventually enter a red intersection.
Interesting.
Seems to me that if everyone put their brakes on when the light turns yellow, no one would enter a red intersection. At least that's the design intent. I've noticed that the duration of yellow lights is adjusted to accommodate the speed limit.
So this looks like a training/compliance issue to me.
Is your solution a technical one?
As an aside, I have a number of patents going back to the 80's in a variety of fields, so I understand your desire to keep it a secret (although, since we adopted the European practices, your application is public when you file it).
Have you filed yet?