(1)    No pedestrian may enter or cross a railroad crossing, and no personal delivery device operator may allow a personal delivery device to enter or cross a railroad crossing, under any of the following circumstances:

      (a)    While a traffic officer or railroad employee signals to stop.

      (b)    While a warning device signals to stop, except that if the pedestrian after stopping and investigating, or the personal delivery device operator after stopping the personal delivery device and investigating, finds that no railroad train or railroad track equipment is approaching, the pedestrian or personal delivery device may proceed.

      (c)    If any crossbuck sign specified under s. 192.29 (5) (a) is maintained at the crossing, while a railroad train or railroad track equipment occupies the crossing or approaches so closely to the crossing as to constitute a hazard of collision.

   (2)   No pedestrian may cross, and no personal delivery device operator may allow a personal delivery device to cross, through, around, over, or under any crossing gate or barrier at a railroad crossing while the gate or barrier is closed or is being opened or closed.

   (3)   No pedestrian may cross through or around or climb over or under, and no personal delivery device operator may allow a personal delivery device to cross through or around or climb over or under, a railroad train or railroad track equipment while the railroad train or railroad track equipment occupies a railroad crossing.