Where did term keep trucking come from?

Answer 1

Back in the 60's there was cartoonist who did stuff for an underground comic call Zap Comix. His name was Robert Crumb and he did a cartoon called Keep on Truckin'. It had four guys walking across different landscapes. the name came for an old blues song called "Truckin' my blues away" That's it. I used to read them,it was a time I'm glad I lived. He did the Fabulous Furry Freak Brothers,too. Never forget Nunzio the Narc,funny stuff