524.Regarding the markings of pedestrian crosswalks, which of the following correctly describes the principlefor installing 'ladder markings' versus 'zebra markings'?
(A) Ladder markings are installed on roadsections without signals; zebra markings are installed at signalized intersections.
(B) Ladder markings areinstalled at signalized intersections; zebra markings are installed on road sections without signals.
(C)Both serve the same purpose and differ only in appearance, so they may be used interchangeably.

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