Sucessor to the California State Department of Public Works, it's the California Department of Transportation. CalTrans trucks are easily identifiable, they're big and orange. Workers are often seen doing maintenance on the freeways. They seem to get a lot of attacks by the general public (At least in Los Angeles.), although I'm not quite sure why, maybe its because so many problems with the road, and if that's true you have to realize they have to deal with community opposition and have to file EPA papers, etc., just to get a project started! And if they're fixing it people complain of the delays...right. However, I have to say they really need to work on proofreading their signs before putting them up.