Similar to a Pittsburgh left except that multiple vehicle make the attempt. Vehicles will generally keep turning left until the opposing traffic forcibly asserts the right of way in a manner similar to a game of "chicken." Named for a practice common in Shanghai, China and other crowded cities in Asia.
"Wow, look at all those cars and trucks attempting a Shanghai left! I can't believe there aren't more accidents here. The highway department should install green arrows and turning lanes."
by wthrfrk80 June 1, 2012