this surprised me, the history of the song Convoy! One of my favorites, of course

The song was created by a fictional musician, C.W. McCall, a character created for Old Home Bread Company’s advertising campaign, resulting in a Clio award

An advertising executive collaborated with Mannheim Steamroller founder 

The song was a response to the 1974 federal speed limit of 55 mph, from 75 mph that truckers were used to

The lyrics were changed for the 1978 movie made by Peckinpah, starring Kris Kristofferson, Ali MacGraw, and  Ernest Borgnine

https://en.wikipedia.org/wiki/Convoy_(song)

https://parade.com/entertainment/the-wild-backstory-behind-convoy-the-novelty-song-that-hit-no-1-in-1976