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。
4 A. ~* Z1 d! [  `- K请问u-turn到底是不是合法的？
: t1 P, |" ^* s" V/ k; w; d! e谢谢！

EightBelow

U-turns
( X& v" p- \8 s, v2 U# k' B• Do not make a U-turn unless you can do it safely and without interfering
' D/ m( k1 e& w, l0 C: \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.
9 @$ H7 H" M, S9 q- p- P0 g2 ^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.
7 L8 }$ D# g# Z/ K; h( b0 H7 K• 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。