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？
- M8 V4 M* m' v6 U谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
2 l' `5 f0 C$ {3 S7 [with other traffic.
• 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.
/ H0 Y- s3 U4 ]" ]- Y6 h) tU-turns are not permitted in urban areas in the following situations:
% _/ V! l6 o9 b( u) n  s- `# ]• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
• At an intersection controlled by a traffic-control signal (traffic lights).
+ D9 K. K7 J: \/ d• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。