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。
, ?  t0 Q* r. _  U" [; v2 F请问u-turn到底是不是合法的？
7 p/ P# _3 n6 T" V谢谢！

EightBelow

U-turns
6 A$ W; ~$ O3 {$ h  N4 `! Q• Do not make a U-turn unless you can do it safely and without interfering
4 k. g: K& ~- o/ Y+ awith other traffic.
• Outside urban areas U-turns are not permitted on a curve or near the
/ u7 W2 {9 G# w- U7 u8 d' screst 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.
- G8 }- S0 s! Z: p1 ]• Where a sign prohibits making a U-turn.
( p( X. o8 O; e& A$ x• At an intersection controlled by a traffic-control signal (traffic lights).
• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。