Docking and Backup Lights
As is often the case, today's article comes from what I see around me as I drive. I was passed by a cube van with one white floodlight on the right rear illuminated. The driver of a truck tractor with no trailer pulled in front of him using the right lane and flashed his docking and backup lights a few times. The offending driver didn't get the hint and his backup floodlight remained on.