pool

A pool is a formal agreement between two or more competing railroad companies to combine their freight or passenger revenues and redistribute them according to a preset formula, rather than competing for individual shipments or routes. The pooling railroad retained separate operations and schedules; what merged was only the financial settlement at the end of each accounting period. Each member line collected its own business, but surrendered receipts into a common fund that was then divided among members, typically in proportion to their agreed-upon share or their historical traffic volume.

Pools emerged in the nineteenth century as railroads sought to stabilize rates and eliminate ruinous price wars. A pool covering a particular corridor or commodity would specify how total receipts would be divided. For example, three lines serving the same route might agree that Line A receives 40 percent, Line B receives 35 percent, and Line C receives 25 percent of combined revenues, regardless of which line actually carried the cargo. This arrangement reduced incentive to undercut competitors and allowed smaller operators to compete on more equal footing with larger systems.

Pools took many forms. Some applied only to trunk line traffic between major terminals; others covered branch line or local business. Grain pools, livestock pools, and coal pools were common in agricultural and mining regions. A few pools involved through-traffic sharing, where a shipper's cargo would be divided among member lines at scheduled intervals. Documentation of pool agreements was typically minimal, relying instead on handshake understandings and periodic reconciliation statements sent between general freight agents.

Why pools failed in practice

Pools proved chronically unstable because members had constant temptation to cheat. A railroad could secretly offer lower rates to shippers or manipulate waybill classifications to capture business that should have gone to a competitor, inflating its own revenues while deflating the pool fund. Detection was difficult; by the time discrepancies appeared in monthly statements, the violator had already shifted traffic or reclassified shipments. Trust eroded quickly, and pools typically collapsed within two to five years.

The Interstate Commerce Act of 1887 and subsequent legislation effectively prohibited pooling among U.S. carriers, though pools persisted informally for decades in certain regions and commodities. Their legacy was the recognition that informal revenue-sharing could not substitute for genuine competition or effective regulatory rate-setting. The term remains in railway history texts as shorthand for the unstable competitive arrangements that preceded modern common-carrier regulation.