A tariff document issued by a railroad or the AAR that contains rules, rates, or procedures applicable to a broad class of transactions, such as car hire rules (AAR Circular OT-10) or interline settlement rules. Circulars supplement individual commodity tariffs with general terms and conditions. They are incorporated by reference into specific tariffs.
A publicly filed schedule of rates, rules, and regulations applicable to railroad transportation services. Tariffs are filed with and accessible through the STB and must be applied consistently to all shippers who qualify. Under the Staggers Act, railroads may supplement tariff rates with confidential contracts.
The principal trade and standard-setting organization for the major freight and passenger railroads in North America. The AAR develops and publishes interchange rules, equipment standards, safety standards, and technical specifications that govern how railroads interact with each other. Membership includes Class I railroads, Amtrak, and many regional and short line railroads.
The transfer of freight cars and the accompanying waybills between two connecting railroads at a junction point. Interchange rules, governed by AAR circulars, define responsibilities for car condition, billing, and liability. It is the mechanism that enables single-bill, multi-railroad shipments across the North American network.
A compensation system under which a railroad pays a daily or mileage-based fee to the car owner when using foreign-owned or privately owned equipment. Car hire rates are established under AAR rules and are intended to recover the owner's fixed and variable car costs. The system balances car supply across the national rail network.