Long Beach police arrested four people on suspicion of driving under the influence of drugs or alcohol during a DUI checkpoint Saturday night.

Police said more than 1,100 vehicles passed through the checkpoint at Seventh Street and Locust Avenue between 6 p.m. and 2 a.m. Of those cars, officers screened 427 drivers, according to the LBPD.

In addition to the four DUI arrests, police said they cited eight people for driving with a suspended or revoked license, 14 for driving without a license at all and three people for unsafe driving.

Police urged people to make sure they have a designated driver and emphasized that a DUI can mean drugs, not just alcohol.

“In recent years, California has seen a disturbing increase in drug-impaired driving crashes,” the LBPD said.