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。
- f6 r! R8 z# M8 \请问u-turn到底是不是合法的？
9 c3 b+ r1 {8 k% ~: b1 B- J5 y7 c谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
with other traffic.
! _7 o" L2 M! t* _6 ]$ w5 O• Outside urban areas U-turns are not permitted on a curve or near the
( _+ b5 n7 n; \% U  q+ a" D$ a+ E0 H4 |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:
• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
; g, [) q1 e8 _0 q; _; F• At an intersection controlled by a traffic-control signal (traffic lights).
- A1 ~3 m6 [. f! I7 F• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。