Cars passing through San Antonio no their way to El Camino were stopped late Friday evening and Sunday morning to participate in a drunk driving campaign.

As early as 8:45 p.m. on Friday, December 12, policemen from both the Mountain View and Los Altos Police Departments ran a DUI checkpoint.

Police officers asked for drivers to have their seat belts on and licenses out.

Los Altos Police Department Chief Tuck Younis said that as of 9 p.m., one person had already arrested for a DUI, a few others had been for other reasons, one other was on an arrest warrant.

“.08 [percent alcohol in the blood] is reasonable but I’d like to see it at .05,” Younis said.

Officers stopped cars to see if they smelled alcohol, if they did they asked the drivers to step out of their vehicles for a sobriety test. If they could not pass the sobriety test, they would resort to a breathalyzer.

KRON4 bus arrived at the scene shortly before 9 p.m.

The test was announced in both the Town Crier and the Palo Alto Daily News as of Thursday.