Apparently, there are many of you who are not reading the sign. It reads 20 mph unless otherwise posted. Where the posted sign reads 15 mph limit, that is what the speed limit is. Where it reads 35 mph limit, that is the speed limit. What is so difficult? Unless otherwise posted is just what the sign means, there is no other way it can be to interpreted. Are there that many people on this forum who can't understand this simple statement?