Here’s a video of them: http://www.youtube.com/watch?v=sdQwsQjz98g

For total cycle lengths, it’s common to go as long as 120 seconds, but you’ll only wait a portion of that for the green unless you just miss the signal. In high traffic areas along major corridors, the cycle length can go up from there. I know of one set of signals around here operating on a 210 second cycle length, but that is unusual.

A red-light running/enforcement episode is a good idea. I’ll put it in the stack.

Is there any considerable numbers of drivers that just get fed-up with traffic lights that are too long? If so, what do traffic engineers consider the longest acceptable wait?

I remember growing up in New Jersey I once sat at a light for seven minutes one late night before I finally got the green. Now that I think about it, I’m pretty surprised that I even waited that long without running it.