Originally Posted by
Black wallnut
The mirror and light exception is limited at 2" over this each side so even if the vehicle body is 102" add 4" and you still have 4' or more of room and the vehicle is still in their lane of travel.
According to the CalTrans site, California does have the 102" limit on width as the 'general rule' but then allows lots of exceptions. E.g. trucks carrying loose agricultural products can have the load be 120" wide, cotton module movers can be up to 130" wide, lights, mirrors, and some other devices can extend up to 10" on each side beyond the 102" limit, and various types of farm equipment are exempt from the width restrictions.