Phil in SF quoted Biking Uphill in the Rain by Tom Fucoloro
Seattle was recently named the best bike city in the United States by Bicycling magazine. …
People who drove on the wrong side of the road or otherwise broke the normal ways of city streets would be called a jay-driver, with jay meaning "a greenhorn or rube," according to Merriam-Webster.
— Biking Uphill in the Rain by Tom Fucoloro (Page 150)
New word: jay-driver
No need for a lookup. Fucoloro did that for me. I knew jay walker was purposely designed to shame pedestrians and claim roads for cars, but i had no idea the word was derived from an epithet for drivers.