Today the Washington State Patrol begins a three-day statewide “Slow Down, Move Over” emphasis patrol to help both troopers and citizens get home safe by bringing awareness to the “Move Over Law”. The law requires that vehicles approaching a parked emergency vehicle zone to proceed with due caution, slow down, and if safe move over, or change lanes. Emergency vehicles include police, fire, medical, tow trucks, and vehicles providing roadside assistance that are making use of warning lights.