In California, the California Highway Patrol (CHP) is responsible for enforcing truck driver regulations. The CHP has the authority to conduct inspections of commercial vehicles and drivers, issue citations for violations, and take enforcement actions such as impounding vehicles or revoking licenses.

If a truck driver is found to be in violation of regulations, such as the Hours of Service regulations or drug and alcohol testing requirements, the driver may be subject to fines or other penalties. In some cases, the trucking company may also be held liable for violations committed by their drivers, particularly if the company failed to properly train or supervise the driver.

If a trucking accident occurs in California and it is determined that the driver or trucking company was in violation of regulations, they may be held liable for any damages or injuries caused by the accident. It is important for trucking companies to ensure that their drivers are properly trained and comply with all applicable regulations to avoid liability in the event of an accident.