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
• Do not make a U-turn unless you can do it safely and without interfering
9 [1 w) m+ p6 a; _7 ?9 W2 {/ Q7 Xwith 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.
* H: L; q2 G. A: z% s3 CU-turns are not permitted in urban areas in the following situations:
" Y+ H, f" b9 O4 l2 K• On a roadway between intersections.
6 p8 ^! u- q+ O• Where a sign prohibits making a U-turn.
- Y0 X- r" U* r, s$ Y' W• 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。