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。
0 f+ t& B4 a5 E3 @请问u-turn到底是不是合法的？
0 o0 u8 z  _5 P  a7 ?谢谢！

EightBelow

U-turns
0 N# c- f" P7 X6 p8 C; B) l• Do not make a U-turn unless you can do it safely and without interfering
with other traffic.
• Outside urban areas U-turns are not permitted on a curve or near the
/ K4 K0 ?5 e. E( n$ [crest of a hill where the driver of another vehicle cannot see your vehicle.
U-turns are not permitted in urban areas in the following situations:
1 d6 d5 h  s3 O2 R5 I; U! p• On a roadway between intersections.
1 ]  T. a. W  J, y• Where a sign prohibits making a U-turn.
• At an intersection controlled by a traffic-control signal (traffic lights).
+ B- L5 B6 ?2 ~) I0 p• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。