No operator of a bicycle shall cross any railroad tracks unless he can do so safely, and shall stop within fifty feet (50'), but not less than fifty feet (50'), from the nearest rail of the track, when:
(A) Any mechanical signaling device gives warning of an approaching train.
(B) A crossing gate is lowered or a flagman gives, or continues to give, warning of an approaching train.
(C) A train is approaching from one thousand five hundred feet (1,500'), more or less, to the crossing, and is giving an audible signal of its approach.
(D) Whenever the operator can see any train approaching such crossing. (1977 Code)