The Alameda Corridor Surcharge (ACS) is an added freight charge that may appear on shipments moving through the Southern California rail gateway connected to the Alameda Corridor. It helps offset costs associated with using that rail route and related terminal or infrastructure expenses, depending on the carrier or service arrangement.
For importers and exporters, ACS is usually one line item among other transportation charges rather than a customs duty or government tax. It is commonly tied to intermodal rail moves that link the Los Angeles and Long Beach port area with inland destinations, so it is most relevant when ocean freight is transferred to rail for inland delivery.
How it appears on freight bills
The surcharge is typically assessed by the rail carrier, ocean carrier, or logistics provider handling the inland portion of the move, and its application depends on the contract, routing, and service product. It may be quoted separately or folded into a broader intermodal price, so shippers should verify whether it is included in the freight rate or billed in addition to it.
Because the charge is route-specific, it does not apply to every shipment through Southern California and may vary with mode and service structure. A common example is an imported container moving from a port terminal by rail to an inland rail ramp, where the ACS is added to cover the corridor-related cost of that inland leg.