I have traveled on highway 1 by car, but not recommended by coach. I have traveled many times on 101 all the way to Washington and it is a nice road most of the way. You have to slow down some going through the Redwoods, but other then that I highly recommend it.
2002 Gulf Stream Scenic Cruiser
2018 Buick Envision Essence
Neway Freightliner chassis
Aventa II Blue Ox