Idaho Code § 61-509
Whenever the commission, after a hearing had upon its own motion or upon complaint, shall find that any railroad corporation or street railroad corporation does not run a sufficient number of trains or cars, or possess or operate sufficient motive power, reasonably to accommodate the traffic, passenger or freight, transported by or offered for transportation to it, or does not run its trains or cars with sufficient frequency or at a reasonable or proper time having regard to safety, or does not stop the same at proper places, or does not run any train or trains, car or cars upon a reasonable time schedule for the run, the commission shall have the power to make an order directing any such railroad corporation or street railroad corporation to increase the number of its trains or of its cars or its motive power or to change the time for starting its trains or cars, to change the time schedule for the run of any train or car, or to change the stopping place or places thereof or to make any other order that the commission may determine to be reasonably necessary to accommodate and transport the traffic, passenger or freight, transported or offered for transportation.
Idaho Code § 61-509