有关u-turn

小胡同

最近查google map for directions, 经常会看到需要u-turn。印象之中好像在主路上不可以，不管是否有不可u-turn的牌子。平常也看到有人在红绿灯处做u-turn。
请问u-turn到底是不是合法的？
谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
2 g3 X. G2 r9 d6 r2 fwith other traffic.
7 a- i2 N% B3 X; v+ \) a. E. Q: t* A• Outside urban areas U-turns are not permitted on a curve or near the
crest of a hill where the driver of another vehicle cannot see your vehicle.
" D- Y3 M5 P/ w9 BU-turns are not permitted in urban areas in the following situations:
$ w4 w5 M8 e1 e5 W% w" e• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
• At an intersection controlled by a traffic-control signal (traffic lights).
% h( g# N; ~: @- o6 d3 P' z• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。