Any driver of a vehicle approaching a railroad grade crossing shall stop within not less than fifteen (15) feet from the nearest rail of such railroad and shall not proceed further while any of the following conditions exist:
(1) A clearly visible electrical or mechanical signal device gives warning of the approach of a railroad train.
(2) A crossing gate is lowered or human flagman signals the approach of a railroad train.
(3) A railroad train is approaching within approximately fifteen hundred (1,500) feet of the highway crossing and is emitting an audible signal indicating its approach.
(4) An approaching railroad train is plainly visible and is in hazardous proximity to the crossing.