Just did 101 last month from Washington state through the San Francisco area. There is a tunnel that the GPS said was only 11 feet clearance but that was wrong there was plenty of clearance for my Class A. A second caution is there are 2 places where part of the road was washed out and under construction. Traffic was signal controlled to only allow one lane at a time. I think this was in Cal. The view in some areas was spectacular but the driver can only enjoy it if you take some of the pull outs. This is drivers eyes on the road or say hello to the Pacific Ocean.