Usually a PA state trooper works with township police to operate this trap. The officer parks in a driveway about 50 feet from Keith Valley Road and sets up his Lidar unit. He is almost completly obscured by trees and shrubbery. The posted speed limit is 35 mph but most drivers do 45 to 50. There are no residences and only a few businesses along this road as it is the rear border for the Willow Grove Naval Air Station. This particular trap irks me most because it is simply a revenue raising device for the township and is totally without merit so far as traffic safety is concerned.