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。
+ f1 H6 |+ k2 o0 r请问u-turn到底是不是合法的？
  o0 L+ ?7 f8 E3 e8 I; V谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
! C9 _6 W+ d5 s; \) owith 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.
2 Y: ^/ S5 i; nU-turns are not permitted in urban areas in the following situations:
, d4 ^5 U# g1 r+ ^% u• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
• At an intersection controlled by a traffic-control signal (traffic lights).
- g  Y$ @% r7 c3 C5 ~1 r- s" Q• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。