[hedora]

Context matters. A while back, a 4 lane (in one direction) piece of I-80 in Oakland had an inexplicable speed limit of 45. People routinely went 80-85mph in the left lane, and the cops didn't seem to care.

Edit: To be clear, the 45mph sign was not obvious at all. Most cars assumed it it was a 55 or 65 zone, and went at about 70. I drove the road two dozen times before noticing the speed limit dropped so far down. Going 45 on that stretch would have been dangerous.

Anyway, I can imagine a road that should be 75 in some other state being posted at 55, and also for going 15 mph over to be common in that state.