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。
5 n, }! F+ _; j$ k" `9 b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
% M% P1 ~5 m5 E' w% a) f, zwith 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.
* Z0 T9 O  s; Q5 z7 k) ]' dU-turns are not permitted in urban areas in the following situations:
* E5 ~; a$ O/ Y• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
5 Q2 d8 C# K& Z• At an intersection controlled by a traffic-control signal (traffic lights).
. f3 }9 d/ G3 @  V; |4 x" ?• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。