Webper california vehicle code 22349 vc, it is illegal to travel on a highway in excess of 65 miles per hour (mph), unless a different speed limit is posted on that highway. (a) except as provided in section 22356, no person may drive a vehicle upon a highway at a speed greater than 65 miles. Webca veh code section 22349. (a) except as provided in section 22356, no person may drive a vehicle upon a highway at a speed greater than 65 miles per hour. Current as of january 01…