I wonder how it would be if we eliminated yellow lights altogether and instead had a countdown on the green light. At the very least it might save gas, as you c

I wonder how it would be if we eliminated yellow lights altogether and instead had a countdown on the green light. At the very least it might save gas, as you could see that the green light ahead will turn red long before you could hope to hit the intersection, so you could coast in. Of course, you'd need to have an adequate "all-red" time for it to not be dangerous.