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
. C2 w8 ]1 W1 M8 ywith other traffic.
% p" T5 k0 f4 {. W• 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.
8 ?. F: s, [# v0 V- U' D$ XU-turns are not permitted in urban areas in the following situations:
• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
+ }% z) t1 U; B4 D• At an intersection controlled by a traffic-control signal (traffic lights).
: x. Y8 C$ D( E• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。