(a) It is unlawful for any railroad company, except in an emergency, to order, allow or permit the operation of or to operate or to so operate its system so that a train blocks the passage of vehicular traffic over the railroad crossing of any public street, road or highway of this state for a period longer than ten minutes. This section does not apply to an obstruction of any such street, road or highway caused by a continuously moving train or caused by circumstances wholly beyond the control of the railroad, but does apply to all other obstructions as aforesaid, including, but not limited to, those caused by a stopped train or a train engaged in switching, loading or unloading operations: Provided, That if any such train is within the jurisdictional limits of any municipality which now has or hereafter shall have in force and effect an ordinance limiting the time a railroad crossing may be blocked by a train, such ordinance shall govern, and the provisions of this article shall not be applicable.

(b) Upon receiving notification from a law-enforcement officer, member of a fire department, operator of an emergency medical vehicle, or a member of an emergency services provider that emergency circumstances require the immediate clearing of a public highway railroad grade crossing, the members of the train crew of the train, railroad car or equipment, or engine blocking such crossing shall immediately notify the appropriate railroad dispatcher of the pending emergency situation. Upon receipt of notice of such emergency circumstances by the train crew or dispatcher, the railroad shall immediately clear the crossing, consistent with the safe operation of the train.