(a) Establishing marked crosswalks and designating them by appropriate marking.
(b) Closing a marked or unmarked crosswalk and prohibiting pedestrians from crossing a roadway where a crosswalk has been closed by placing and maintaining signs giving notice of closure.
(c) Prohibiting pedestrians from crossing a highway at any place other than within a marked or unmarked crosswalk.
(2) This section neither grants authority to nor limits the authority of the Department of Transportation. [1983 c.338 §152]