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。
* Y( f# X1 V, N, c! S: j请问u-turn到底是不是合法的？
谢谢！

EightBelow

U-turns
1 v6 G" e; C4 O  j& ~. i, T5 B1 X• Do not make a U-turn unless you can do it safely and without interfering
- ]# d7 F2 f+ W( R; {with other traffic.
0 \& j, s7 J; y2 k/ s" X• Outside urban areas U-turns are not permitted on a curve or near the
" ]1 i# y" c! ^* n: \% bcrest 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.
8 \6 d' r% L: @6 i' e1 d7 a• Where a sign prohibits making a U-turn.
. t6 P9 g2 V9 u. L• At an intersection controlled by a traffic-control signal (traffic lights).
! C! T; [' m3 b/ `( M• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。