Backup beepers aren't even effective: https://www.thetruthaboutcars.com/2011/01/the-truth-about-backup-beepers/ https://www.thetruthaboutcars.com/2011/01/the-tr

Backup beepers aren't even effective: https://www.thetruthaboutcars.com/2011/01/the-truth-about-backup-beepers/ https://www.thetruthaboutcars.com/2011/01/the-truth-about-ba... The cynic in me thinks it was regulatory capture. Manufacturers of the beepers lobbied to make them required. Like scaffolding in New York. No proof though.