The flashing yellow arros on traffic signals solve a problem that circular green lighs can not. The problem is called yellow trap. When a traffic signal shows a circular green in both directions, left turns can filter through gaps in oncoming traffic. But what happens if one directions turns y…

Flashing yellow arrows

Xebadaih March 9, 2009, 9:32pm 2

Thanks for this explanation. I’ve been losing sleep over this issue for years now.