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。
- G$ T. N/ {5 q请问u-turn到底是不是合法的？
: I1 k$ r3 s* [3 z- x3 \谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
with other traffic.
• Outside urban areas U-turns are not permitted on a curve or near the
8 _& V8 P9 B6 F1 r0 a1 m8 Acrest of a hill where the driver of another vehicle cannot see your vehicle.
% y8 {5 ~- F  {& S2 ]/ RU-turns are not permitted in urban areas in the following situations:
5 z5 b) ]0 i+ r5 A: Q• On a roadway between intersections.
/ _" U9 U% D1 x1 _0 R• Where a sign prohibits making a U-turn.
( G  K% w3 E: h! L: c5 C5 F• 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。