This is pretty out of the way, but it’s so blatant I just had to send it in. Coming into Exeter from Farmersville, it’s a long straight stretch and the speed limit is unmarked (therefore 55, but traffic normally moves around 60), then BANG! You hit the city limits and it plunges down to 35. The only warning is an inconspicuous sign saying "Speed Zone Ahead" about 200 feet from the actual sign. There are other changes in the speed limit along this road, but this is the only one so poorly marked. Exeter is a growing city and I’m sure it doesn’t mind the money.