The California Department of Transportation and the California Highway Patrol are installing the first of 100 signs today across the state's freeways urging drivers to move over or slow down for law enforcement, highway workers and emergency personnel.
Of those 100 signs, seven will be posted in San Diego and Imperial County.
The message comes from the 2007 Move Over law, which requires drivers to move or slow down when approaching Caltrans highway workers, law enforcement and other emergency vehicles.
According to a Caltrans press release, 178 Caltrans employees have died during highway construction or maintenance.
CHP Commissioner Joe Farrow said the number of deaths and injuries that happen along California highways increases each year.
"One way to help minimize the risk for these workers is for the motoring public to do their part by paying attention and exercising caution on the road," Farrow said.
Caltrans spokesman Steve Saville said San Diego will unveil its signs on April 24 as part of its Highway Workers Memorial Day ceremony.