Travelling either north or south on Coit Rd north of N. Rolater the posted speed is 45 mph. It is also a school zone and the limit drops to 20 mph during posted hours. Be very careful of your speed at all times. Frisco PD obscurely camp out in the parking lot of the school and they will bust you even if you are going 5 mph over the limit outside of the posted school zone hours when the limit is 45 mph. They are there all hours of the day with radar.