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。
3 Y3 K& w3 X5 A请问u-turn到底是不是合法的？
谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
with other traffic.
+ Y5 f! p# i  t% N2 |( e( D( J• 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.
7 ^+ [3 z) P% G. U  k& f) y2 RU-turns are not permitted in urban areas in the following situations:
• On a roadway between intersections.
% u5 l7 Z9 f: x- j# c1 ^• Where a sign prohibits making a U-turn.
& i" y0 {, w  s" s. J% b0 Y7 t4 z" Y& H• At an intersection controlled by a traffic-control signal (traffic lights).
, Q1 Y+ |2 E# {& y6 x# n$ `5 |5 b• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。