There's a road that's effectively like that near where I live. AFAIK the traffic laws in my home state dictate that a speed limit change on a road takes immedi

There's a road that's effectively like that near where I live. AFAIK the traffic laws in my home state dictate that a speed limit change on a road takes immediate effect at the location of the sign indicating a new speed. There is a place where the limit goes from 25 to 35 and the signs on opposite sides of the road are at least a half mile apart, meaning that depending on which way you're going on that stretch the speed limit could be legally interpreted as 25 or 35. It seems like this would be dependent on specific interpretations of various state laws.