Royal Parkway connects Elm Hill Pike and Donnelson Pike and the nearby interstate I40. This four lane parkway with striped median has only limits number of buildings because it is in the direct line of the east runways of Nashville International Airport. Reasonable safe speed would be 40 – 45 mph. It is not very well marked but it is posted at only 30 mph. Police hide their vehicles on Claridge Ave. and stand at the corner with portable radar gun. As speeding traffic approaches, he steps into the street and waves the speeder into Claridge Ave. Other police officers write up tickets while keeping all cars out of sight of approaching traffic. I don’t have any problem with their tricky methods; I only think the speed limit is unreasonably low and set for the purpose of ticket revenues.