California

Truck speed limits in California: Highway 55 mph, Rural 55 mph, Urban 55 mph. Trucks limited to 55 mph on ALL roads regardless of posted limit. Left lane: Trucks restricted from left lanes on many multi-lane highways; CVC 21655.

Chain controls enforced on mountain passes (I-80, I-5, SR-88, etc.) during winter; up to 8 chains may be required; R-1/R-2/R-3 chain control levels Construction: Year-round construction; extensive Caltrans projects with lane restrictions; environmental restrictions may limit hours.

Extensive restricted routes; many urban freeways have truck restrictions; STAA network designates approved routes; no trucks on state scenic highways

Aggressive enforcement; CHP dedicated commercial vehicle units; California-specific intrastate HOS rules ELD: Full federal ELD plus California-specific requirements; 6-month data retention mandate.

Very high; CHP conducts extensive roadside inspections and facility audits; BIT program requires periodic inspections Drug testing: Federal DOT plus California state drug testing program; strict enforcement.

Very limited; 58 spots per 100K truck miles; severe shortage especially in LA basin and Bay Area

For the most current trucking regulations in California, visit the official enforcement page at https://www.chp.ca.gov/programs-services/programs/commercial-vehicle-section.