The U.S. freight rail network is mainly served by six large Class I freight railroads: BNSF Railway, Union Pacific, CSX Transportation, Norfolk Southern, Canadian National Railway (CN), and Canadian Pacific Kansas City (CPKC). Their networks are different mainly because some are concentrated in the West or East, while CN and CPKC provide important cross-border routes.
BNSF Railway
BNSF has one of the strongest networks in the western and central United States. It connects the Midwest with the Pacific Northwest, California, Southwest, and Texas.
Its major freight areas include:
- Agricultural products
- Coal
- Consumer goods
- Industrial materials
- Intermodal containers
BNSF is especially important for freight moving between inland production areas and western ports.
Union Pacific
Union Pacific also has a large western U.S. network, covering the Midwest, Rocky Mountain region, West Coast, Southwest, and Texas.
Its major freight routes serve:
- Agricultural regions
- Chemical and industrial centers
- Automotive markets
- Intermodal terminals
- Major western and Gulf Coast markets
BNSF and Union Pacific therefore have the strongest coverage across the western half of the country.
CSX Transportation
CSX has a major network across the eastern United States. Its routes connect the Midwest, Northeast, Southeast, and parts of the Gulf region.
It serves important markets around:
- Chicago
- New York and the Northeast
- Southeast
- Atlantic ports
- Gulf Coast connections
CSX carries coal, chemicals, agricultural products, automobiles, industrial goods, and intermodal freight.
Norfolk Southern
Norfolk Southern is also mainly an eastern U.S. railroad. Its network connects the Midwest with the Southeast and Northeast.
Major freight corridors connect areas around:
- Chicago
- Ohio Valley
- Mid-Atlantic
- Southeast
- Major Atlantic ports
It has a strong role in intermodal, automotive, chemical, agricultural, and industrial freight.
Canadian National Railway (CN)
CN is headquartered in Canada but has an important U.S. network, particularly across the Midwest and central United States.
Its routes provide connections between Canada and major U.S. markets, including the Great Lakes, Midwest, and Gulf Coast.
This gives CN an important role in cross-border and north-south freight movements.
Canadian Pacific Kansas City (CPKC)
CPKC has a different network from the other major railroads because it provides a Canada–U.S.–Mexico connection.
Its U.S. operations are concentrated around the Midwest, central states, and southern markets, with the network continuing into Mexico.
This makes CPKC particularly important for international north-south freight.
How the Networks Differ
The basic geographic pattern is:
- BNSF: Western and central U.S., with strong Pacific and Midwest connections.
- Union Pacific: Western U.S., connecting the Midwest, West Coast, Southwest, and Texas.
- CSX: Eastern U.S., with strong Northeast, Southeast, Midwest, and port connections.
- Norfolk Southern: Eastern U.S., especially Midwest-to-Southeast and Mid-Atlantic routes.
- CN: Cross-border network linking Canada with the U.S. Midwest and central regions.
- CPKC: North-south network connecting Canada, the United States, and Mexico.
Major Freight Routes
These companies handle large volumes of:
- Agricultural commodities
- Coal and energy products
- Chemicals
- Automobiles
- Industrial materials
- Consumer goods
- Intermodal containers
The western railroads are particularly important for Pacific Coast and western inland routes, while CSX and Norfolk Southern have extensive connections between eastern population centers, manufacturing areas, and ports. CN and CPKC add important international routes.
Conclusion
The U.S. railroad system is built around two major western networks, two major eastern networks, and two cross-border networks. BNSF and Union Pacific dominate long-distance freight movement across the West, while CSX and Norfolk Southern cover much of the East. CN provides major Canada-U.S. connections, and CPKC offers a unique Canada-U.S.-Mexico freight corridor.