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 }. M" a0 x4 }# h- ~8 t请问u-turn到底是不是合法的？
谢谢！

EightBelow

U-turns
! B, E9 Q+ w1 H  U• Do not make a U-turn unless you can do it safely and without interfering
8 B- Z, P- r9 h4 n8 Wwith other traffic.
$ f1 m' Z( D9 T) `/ I3 F• 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.
! Z6 Y) M6 K, W8 o) EU-turns are not permitted in urban areas in the following situations:
2 f( Q. ?5 }$ H. a• On a roadway between intersections.
. n/ R! T; p0 h4 A3 L$ |• Where a sign prohibits making a U-turn.
• 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。