Pleasanton police in coordination with other law enforcement agencies impounded 15 vehicles during a sobriety checkpoint Monday night, according to the Police Department.

The checkpoint was set up on westbound Bernal Avenue at Pleasanton Avenue from 6:30 p.m. to 11 p.m., police said.

Livermore and Dublin police, the California Highway Patrol and the Alameda County Sheriff’s Office aided in the effort, screening 1134 vehicles.

A total of 15 vehicles were impounded for either driving under the influence or driving as an unlicensed or suspended driver, police said. Four drivers were arrested on suspicion of driving under the influence, and 14 drivers were given citations for driver’s license violations, according to police.

Mothers Against Drunk Driving handed out information to drivers who were stopped at the checkpoint, which was funded by the California Office of Traffic Safety and the National Highway Safety Administration, according to police.