The beginning of the summer brings more drivers to the road and increased traffic patrols looking for drunk drivers. So far this holiday week, police in L.A. County have counted nearly 500 DUI arrests. That count is just from Friday, June 29 through Tuesday, July 3, so expect it to go up once July 4 data is available. Despite that high-sounding number, California Highway Patrol Officer Vince Ramirez says the roads haven't been that bad.

"The general consensus we're getting from officers is that traffic has been relatively light this week and it may have been directly effected by the fact that the July 4 holiday fell in the middle of the week," Ramirez said.

A countywide DUI crackdown by multiple agencies will continue through Sunday. Tonight: Norwalk checkpoints. Exact spots haven't been announced yet.