Plano police drive or park in the opposing lane’s shoulder and take speeds most commonly using Ka Band Radar, or as recently discovered they now use Lidar which is used heavily off the the Parker overpass. Further, watch out for the white stripes 500 feet after the Spring Creek bridge because they are a VASCAR timing mark! Motorcycle cops are no stranger to the pillars under the Parker and the Park overpasses. The posed speed limit is 65, but traffic commonly flows 70-75 MPH.