Idaho Code § 49-1425: Railroad trains not to unnecessarily block crossings.

No person or government agency shall operate any train in a manner as to prevent vehicular use of any highway for a period of time in excess of fifteen (15) consecutive minutes except:

(1) When necessary to comply with signals affecting the safety of the movement of trains;

(2) When necessary to avoid striking any object or person on the track;

(3) When the train is stopped to comply with a governmental safety regulation;

(4) When the train is disabled;

(5) When the train is in motion except while engaged in switching operations;

(6) When there is no vehicular traffic waiting to use the crossing.