Speaking of light rotation, there's an intersection near me whose right-turn-only lane light does this:

1. Light is green (90 seconds)
2. Light turns yellow (8 seconds)
3. Light turns red (2 seconds)
4. Light turns to a green arrow (90 seconds)

(times approximate)

I can't tell you how many times I've arrived at that light and had to come to a complete stop, only to immediately go again, just because some schmo couldn't be bothered to program it reasonably.

If there actually are people driving left-to-right across the intersection, then it (obviously) stays red for longer. But that's relatively infrequent and people blow through the light all the time because it's just insane for the transition between "you can go" and "you can go" to be to come to a stop. So not only does this irritate the piss out of me, it's dangerous, too.