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。
请问u-turn到底是不是合法的？
谢谢！

EightBelow

U-turns
# A2 {5 i! R9 C3 s6 g# z3 `• Do not make a U-turn unless you can do it safely and without interfering
with other traffic.
' B' k% k# ]* q( @3 ~• Outside urban areas U-turns are not permitted on a curve or near the
1 t( j( [. H' W8 W& O0 Pcrest 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.
4 o) a  X, l3 F8 e  W4 U• At an intersection controlled by a traffic-control signal (traffic lights).
4 W6 g! x( L) z/ C$ D; r• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。