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。
" Q; ?0 C3 a) q/ t请问u-turn到底是不是合法的？
, a3 O) A, |2 ]5 I谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
with other traffic.
• Outside urban areas U-turns are not permitted on a curve or near the
" S% l: m/ o( ~7 q& ^( G  Wcrest of a hill where the driver of another vehicle cannot see your vehicle.
, }8 d- J$ i) J9 g% \U-turns are not permitted in urban areas in the following situations:
• On a roadway between intersections.
# }3 S- `& C- m2 v/ ~) y• Where a sign prohibits making a U-turn.
8 N5 E" ~' R" Y9 l( C• 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。