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
- H9 q7 i2 m1 K! I2 g- ^: |• Do not make a U-turn unless you can do it safely and without interfering
2 d; ^* B% y* R- Jwith other traffic.
5 A5 j8 j- z; A• Outside urban areas U-turns are not permitted on a curve or near the
5 m) |& o& D/ F% H* b! Mcrest 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:
• On a roadway between intersections.
* Z. f3 v1 S+ ~• Where a sign prohibits making a U-turn.
+ k8 w$ ~: G$ g# a/ H/ f• At an intersection controlled by a traffic-control signal (traffic lights).
: ?9 U/ \* _) f* d& S• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。