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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,
7 }- N" A7 H$ h5 n; H: j * Anywhere a sign prohibits a U-Turn,
; X0 {# W$ U5 P: v" ^ d" _6 Z * In urban areas between intersections,
0 S& F! t3 ~1 a, z D * At alleys and driveways,; n8 Z/ l) C2 K8 G7 M; x- `; h
* At an intersection controlled by a traffic signal (unless signage or signals specifically allow this maneuver),
5 y% d6 |0 c8 I# \5 |8 h4 n2 w * 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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