Police in Santa Monica are staging extra traffic enforcement patrols on Friday in areas of the city where cars have previously struck bicyclists or pedestrians.

In the past three years, Santa Monica officers have investigated 874 injury collisions involving cars striking bicyclists or pedestrians, according to Sgt. Rudy Camarena.

Friday’s push to reduce such collisions involves citations for drivers who speed, make illegal turns, fail to stop for signs or signals, or fail to yield to pedestrians. Pedestrians who cross the street illegally or fail to yield to drivers with the right of way will also get citations, as will bicyclists who violate the same traffic laws that apply to motorists.