SAN DIEGO -- Law enforcement throughout San Diego County will be erecting sobriety checkpoints and conducting extra patrols this Memorial Day weekend as part of a multi-agency "Avoid DUI Campaign."

Sobriety checkpoints will be staffed Friday night in Oceanside, Escondido and San Diego, according to campaign spokesman Jason King, a San Diego County Sheriff's Department spokesman.

From 6 p.m. Friday through midnight Monday, more police officers than usual will be patrolling Escondido, San Diego, Chula Vista, Coronado, Encinitas and National City looking for drunken drivers, he said.

Sheriff's deputies will be doing the same thing in Encinitas, Del Mar, Imperial Beach, San Marcos, Solana Beach, Vista and the county's unincorporated areas, King said.

The California Highway Patrol will also step up its efforts to stop drunken driving on the county's highways and freeways. About 80 percent of all available CHP officers will be working this weekend, King said.