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。
7 {3 a! {' q: M: N3 A. E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
( L; [4 Y+ Y6 Z, v+ {with 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.
U-turns are not permitted in urban areas in the following situations:
1 w7 d  R  L& J- x# P( n# @• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
: \9 o% x" S7 ^" q% ~% g/ L2 n# A) H• At an intersection controlled by a traffic-control signal (traffic lights).
4 c+ Y; u! ?4 r5 s" P: j4 l• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。