All railroads shall on the order of the Public Service Commission keep and maintain adequate and suitable depots, buildings, switches and sidetracks for the receiving, handling and delivering of freight transported or to be transported by such railroads, where public necessity demands it and the revenue received at such point will be sufficient to justify it, together with a sufficient force of employees at each of said depots to transact efficiently the business and traffic thereat.
Ala. Code § 37-2-130 (1975)