railroads in the United States

railroads in the United States
Name	Railroads in the United States
Locale	United States
Start	1826
Gauge	Standard gauge (4 ft 8+1⁄2 in)
Length	~140,000 miles (trackage)
Headquarters	Washington, D.C.

Contents

railroads in the United States Railroads in the United States developed from early lines built by private entrepreneurs such as Baltimore and Ohio Railroad founders and industrialists who interacted with financiers like Cornelius Vanderbilt and politicians including Abraham Lincoln. The network expanded rapidly across regions including New England, the Mid-Atlantic states, the Midwest, and the American West driven by legislation such as the Pacific Railroad Act and investment from firms like J.P. Morgan & Co.. By the 20th century companies including Pennsylvania Railroad and Union Pacific Railroad shaped freight and passenger flows while institutions such as the Interstate Commerce Commission and later the Surface Transportation Board regulated routes, rates, and mergers.

History

Early experimentation with horse-drawn and steam-powered lines began near ports like Baltimore and Philadelphia with chartered carriers including the Baltimore and Ohio Railroad and the Erie Railroad. The transcontinental connection achieved by the meeting of the Union Pacific Railroad and the Central Pacific Railroad at Promontory Summit, Utah followed the passage of the Pacific Railroad Act and involved contractors like Central Pacific (Big Four), famously associated with financiers such as Leland Stanford and Collis P. Huntington. The Gilded Age saw consolidation by magnates including Vanderbilt into systems such as the New York Central Railroad and the Great Northern Railway of James J. Hill. Federal responses to rates, pooling, and strikes—most notably the Pullman Strike—prompted the creation of the Interstate Commerce Commission. The 20th century brought electrification projects in New York City and Chicago, military mobilization in both World War I and World War II, and postwar decline in passenger service leading to the formation of Amtrak and deregulation under the Staggers Rail Act.

Track and right-of-way engineering evolved from broad-gauge experiments to near-universal adoption of standard gauge, with major construction techniques applied by firms such as Holland Company. Bridge and tunnel projects linked corridors through obstacles like the Allegheny Mountains and the Sierra Nevada, employing designs similar to those of John A. Roebling and contractors who worked on the Hoosac Tunnel. Signaling migrated from manual telegraph coordination associated with Western Union to centralized traffic control and positive train control mandated by the Rail Safety Improvement Act of 2008. Locomotive technology advanced from early steam builders like Baldwin Locomotive Works to dieselization led by General Motors Electro-Motive Division and modern high-horsepower units from GE Transportation, while rolling stock innovations included containerization tied to intermodal yards operated by companies such as BNSF Railway.

Railroads shaped settlement patterns across territories administered by the Department of the Interior and spurred urbanization in hubs like Chicago, St. Louis, and Los Angeles. Financing models involved capital markets centered in New York City and families like the Vanderbilts and firms such as J.P. Morgan & Co., influencing industrial supply chains for commodities from coal fields to grain elevators on the Great Plains. Labor disputes involving unions such as the Brotherhood of Locomotive Engineers and Trainmen and events like the Great Railroad Strike of 1877 affected wage standards and social policy debates in the Progressive Era. Rail freight supported sectors represented by organizations like the National Association of Manufacturers and linked export gateways at ports including New Orleans and Seattle.

Federal oversight began with the Interstate Commerce Act and the creation of the Interstate Commerce Commission, later succeeded by the Surface Transportation Board after restructuring under administrations that included Jimmy Carter. Safety statutes such as the Rail Safety Improvement Act of 2008 mandated technology deployment and coordination with agencies including the Federal Railroad Administration. State public utility commissions and metropolitan planning organizations coordinate commuter operations with entities like Metra and SEPTA, while antitrust scrutiny by the Department of Justice has influenced mergers such as those involving Union Pacific and Southern Pacific Transportation Company.

Class I carriers such as Union Pacific Railroad, CSX Transportation, Norfolk Southern Railway, BNSF Railway, and Kansas City Southern dominate freight traffic across corridors like the Southern Transcon and the Pacific Northwest. Short line and regional operators including Genesee & Wyoming and numerous switching and terminal railroads serve industrial zones in cities like Cleveland and Pittsburgh. Passenger operators include federally chartered Amtrak and state-supported commuter agencies such as Metra in Chicago and Caltrain in the San Francisco Bay Area. Intermodal terminals, classification yards like Bailey Yard, and bulk terminals link to ports such as Long Beach and Savannah.

Intercity passenger service consolidated under Amtrak in 1971 after decline of long-distance trains run by carriers such as Penn Central Transportation Company and Southern Pacific Railroad. Corridor investments include projects on the Northeast Corridor shared with MBTA and NJ Transit, with high-speed proposals involving agencies like the Federal Railroad Administration and private initiatives such as those by Brightline. Commuter rail systems operate under regional authorities including Metra, MBTA, and Sound Transit, while tourist and heritage operations preserve equipment through organizations like the California State Railroad Museum.

Accident investigations by the National Transportation Safety Board have driven regulatory changes following incidents affecting hazardous materials shipped by carriers like CSX Transportation. Environmental concerns involve diesel emissions addressed via EPA regulations and adoption of cleaner locomotives by manufacturers including Cummins Inc. and Wabtec Corporation. Climate resilience planning incorporates agencies such as the Federal Emergency Management Agency and state departments responding to events impacting rights-of-way in regions from the Gulf Coast to the Northeastern United States.