:It may be legal in CA, but that doesn't mean it is safe.  One of these days, I am going to block one of these bastards and teach him a lesson.  And the "overheating" argument is a bunch of bunk.  My 1965 Mustang overheats when I am in traffic, too, but that doesn't give me the drive like a jackass and drive between cars threatening everyone's safety.  What a bunch of selfish pigs!!  One of these days, we car drivers are going to rebel and give you what you have coming to you.  We will have a go at those uppity, self-righteous bicyclists, too!!You heard it hear first - time for the counterprotest.