CALTRACS INSTALL GUIDE - STANDARD. Hooks your vehicle, especially on hard acceleration, even in the dirt!Improves consistency and 60-foot times; Keeps axle from rotating, maintains pinion angle. Park truck on a flat work area, chocking the front tires is advised to avoid rolling. The Contra Costa Transportation Authority (CCTA) aims for a future where transportation systems integrate to enhance safety, efficiency, and convenience. Contra Costa County extension (eBART) is under construction and will be awarding a contract for its. CALSAWS BROADCAST: Starting at a.m. California Model Statute Task Force. Crack cocaine use among persons with tuberculosisContra. Costa County, California, 1987–1990.