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U-turns are often prohibited for various reasons. Sometimes a sign indicates the legality of U-turns. However, traffic regulations in many jurisdictions specifically prohibit certain types of U-turns. Laws vary by jurisdiction as to when a U-Turn may or may not be legal. Examples of jurisdictions with codified U-turn prohibitions include the Provinces of Alberta and British Columbia and the State of Illinois.[1] In Alberta, U-Turns are prohibited in certain circumstances, for example (ref. Alberta Regulation 304/2002, Division 7):
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* At the crest of a hill or on a curve unless the driver can see at least 150 m ahead,
/ q% {8 P+ ]8 f2 ^0 L7 I * Anywhere a sign prohibits a U-Turn,& O; Q: Y( R" z6 w2 o6 x E
* In urban areas between intersections,& V: w/ ]9 L+ W: J: N' N
* At alleys and driveways,
8 r. q8 J* F/ h, Q7 A * At an intersection controlled by a traffic signal (unless signage or signals specifically allow this maneuver),
$ K. W3 T0 Q: R- @9 |. ] * By a school bus on an undivided highway or on a divided highway where the length of the bus is longer than the width of the median between the two carriageways. |
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