Still photographs of railroad structures for the passage of trains underground.
Still photographs of railroad rolling stock, typically locomotives, cars or maintenance of way support cars, and including railroad-owned buses and trucks.
Still photographs of buildings and structures created by the railroads.
Photographs of railroad yards where railroad trains are made up and cars are switched, stored, and serviced on tracks and sidings and related structures such as yard offices.
Still photographs of railroad tracks and directly associated structures such as yard offices, switches, and grade crossings
Still photographs of railway rolling stock that is designed to carry passengers. The term passenger car can is also applied to sleeping cars, baggage, dining, business cars and railway post office cars.
Photographs of railroad track along main or branch lines.
Still photographs of people employed by the railroad, usually in performance of their duties. Also included are railroad passengers and other people working or living the vicinity of railroad facilities.
Still images of railroad equipment, facilities, employees, customers and other railroad-related subjects whether printed photographs, negatives, slides or digital.
Photographs of landscapes surrounding or visible from railroad facilities.