the is more to it than what you all are calling leagal (radar certified). Also know if the streets are new or the agency has just gained jurisdiction of a roadway. D.O.T must approve them for use of radar on that road. Radar is really no good against multiple vehicles. cause there is no way to really tell who is doin what. cause it locks on until it is out of range. thats why you see alot of GSP and Herny Co PD with the laser guns.