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。
$ s3 C6 u! E. S# {3 U: k. g/ Y请问u-turn到底是不是合法的？
/ m$ I0 S/ Z* S# g- n谢谢！

EightBelow

U-turns
$ h2 p9 g- C8 m; S# W• Do not make a U-turn unless you can do it safely and without interfering
  Y( r: d! L. P0 s6 t) M) awith 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.
3 P2 n5 t% e4 u5 s6 q" Y2 {0 b% ZU-turns are not permitted in urban areas in the following situations:
* F) @. |1 U+ F• On a roadway between intersections.
( A% H, y" j. K" ~  k1 F  P• Where a sign prohibits making a U-turn.
• At an intersection controlled by a traffic-control signal (traffic lights).
1 U3 c5 x7 T( M- s/ O• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。