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。
) b" o" M5 f) g请问u-turn到底是不是合法的？
6 M5 h9 a: V5 P) ?$ s- k9 Z0 Y谢谢！

EightBelow

U-turns
0 T' @: P3 T6 K4 Z• Do not make a U-turn unless you can do it safely and without interfering
6 G5 e# Z$ j  [% z5 rwith other traffic.
• Outside urban areas U-turns are not permitted on a curve or near the
- q7 D2 q% f! a) bcrest of a hill where the driver of another vehicle cannot see your vehicle.
. Y$ [6 F+ F2 @" ~2 A) W* M# iU-turns are not permitted in urban areas in the following situations:
• On a roadway between intersections.
% }& H5 J9 D/ w3 d• Where a sign prohibits making a U-turn.
6 I- K8 z0 z& t; C9 \- o4 g• 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。