A special rate concession made by shipping lines, rail carriers and truckers serving the U.S. West Coast for export and import traffic, intended to benefit midwest shippers and importers by equalising rates to and from other coastal areas, and offering these midwest companies a comparable alternative. The steamship companies lower their rates and the inland carriers pick up the terminal charges, which consist of handling charges, wharfage charges and car loading or unloading charges. OCP rates apply to cargo shipped from or consigned to the states of: North Dakota, South Dakota, Nebraska, Colorado, New Mexico and all states east thereof. OCP rates in Canada apply to the provinces of: Manitoba, Ontario and Quebec.

Overland Common Point rates which are generally lower than local tariff rates. They were established by the U.S. West Coast steamship companies in conjunction with railroads serving the western U.S. ports so that cargo originating or destined to the American Midwest and East would be competitive with all-water rates via the U.S. Atlantic and Gulf ports. O.C.P. rates are also applicable to eastern Canada.