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。
6 c) E" w* [5 k请问u-turn到底是不是合法的？
谢谢！

EightBelow

U-turns
1 r7 C. v" B7 q8 M• Do not make a U-turn unless you can do it safely and without interfering
$ S. }8 [/ b5 f" U/ @% b/ Jwith other traffic.
• Outside urban areas U-turns are not permitted on a curve or near the
  Y: t- S+ N" U3 ~: P1 w7 Gcrest 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:
' d+ h$ j: u0 X: X• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
2 T% B6 A0 ]4 i' M: }* S! N& w  v: O• 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。