Mostly during rush hours,Parked patrol car/Radar gun used coming downhill on La Prada going East between Galloway and nearing I 635; Also, School Zone both directions on La Prada between Barnes Bridge Rd. to Gus Thomasson Rd. where speed is 30 but going East or West hard to maintain 30 m.p.h. between Gus Thomasson and Barnes Bridge either direction. Patrol car often in Calvary Hill Church parking lot, parked along side La Prada or on a side street waiting. All of the sudden, due to the unapparent slope of the road, both directions, you get caught going 5 miles over the limit. It so easily and unknowingly happens.