The speed limit is 40 mph, but that is unrealistic, you will always see MC Constables, Sheriff, and TX DPS. They are now even in unmarked cars, such as a Ford F250 Maroon Pickup with no markings except on the tailgate. They also hide in personal driveways and behind trees. They will tailgate the vehicle in front of them so oncoming traffic can not see their lights. They also drive a wide range of vehicles (constables) because they purchase their own vehicles. Be Careful, I have gotten 3 tickets in the past couple of years.