California Department of Transportation


Q How many call boxes are there, and where are they located?

Currently, 29 of the state's 58 counties have call box programs. These range from the system in Los Angeles County, with more than 4,000 call boxes, to Humboldt and Del Norte counties, where only a few call boxes have been installed in particularly isolated areas. Statewide, there are 15,000 call boxes, lining some 6,300 miles of California highways. Call boxes throughout California generate more than 100,000 calls per month. All costs associated with the call box program are paid for by a $1 annual fee assessed on vehicles registered in the participating county. Caltrans, the California Highway Patrol and regional "SAFE" agencies ("Service Authority for Freeways and Expressways") jointly operate the program. Some counties in California, generally in rural areas, do not have call boxes. The primary reason is that these counties do not have enough registered vehicles to purchase, operate and maintain a system of call boxes.