What blues singer sang about "the highway is my home and my Cadillac is my Bed? What song was it?

what blues singer sang about "the highway is my home and my Cadillac is my Bed? What song was it?

I'm taking a guess here, but I think it's Magic Slim. I had a vinyl copy of "Highway Is My Home", by Magic Slim & The Teardrops back in the late '70's. He's still going strong today playing Chicago Blues.