I live in Garland and work in Rocwall, and run parts for work all the time. As you go 30 East from about NW Hwy, there are various spots Garand PD and a couple Constables sit. One is just past Beltline on the right, at Garland Inn, a GPD will it at the entrance hidden behind a hill and will laser people… Another place is going East or West, GPD or the Constables will sit on the left shoulder and catch people coming over the hills.