tell you what, we Shanghaiese call left turn 大转弯，and right turn 小转弯，because u see the crossroads, if u wanna make a left turn, it will bigger than a right turn does, plz imagine like that if u make a left turn, u should go thru the vehicles and wait for the lights, but if u make a right turn, u can just do without waiting for anything, it's quite simple. ahh, if any doubts still, just shoot!