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。
/ m; L3 P" q( r+ n9 w( R5 Q请问u-turn到底是不是合法的？
- H, h9 }+ ?( ~' D& o- X$ Q谢谢！

EightBelow

U-turns
0 S+ H. U+ u+ z• Do not make a U-turn unless you can do it safely and without interfering
' M" J) r! v0 z7 L8 Twith other traffic.
4 V1 f3 u9 P9 b/ c• 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:
' t+ g8 m7 z3 u8 Z: M3 B/ C• On a roadway between intersections.
3 f) l, S! W$ u) C% h% z+ T5 D• Where a sign prohibits making a U-turn.
• 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。