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 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.
Still images of railroad equipment, facilities, employees, customers and other railroad-related subjects whether printed photographs, negatives, slides or digital.
Still photographs of locomotives that employ an onboard diesel engine to generate electricity to turn the wheels, as well as locomotives whose diesel engines power the wheels through a gear box or through a hydraulic system.