Railroads, roads on which trains of freight and passenger cars, drawn by locomotives, travel on tracks formed by pairs of parallel metal rails (see Locomotive). The term railroad is often extended to include the rolling stock, or cars and locomotives, and the land, buildings, and equipment owned or operated in conjunction with the railroad lines. The terms railroad and railway are interchangeable in the United States (Culture Design Identity Railroad, Build Design Garden Railroad).
Computerized control rooms allow railroad personnel to monitor activity on many railroad or subway lines simultaneously. Computers have greatly increased the safety and efficiency of rail transportation. This control room coordinates rail activity at Victoria Station in London (Culture Design Identity Railroad, Build Design Garden Railroad).
This diesel-electric locomotive hauls a passenger train. Diesel engines spin generators that produce electricity to power the locomotive. They are more efficient than steam locomotives and do not require the overhead power lines needed for electric engines (Culture Design Identity Railroad, Build Design Garden Railroad).
Passengers aboard the Orient Express enjoy a meal in the dining car. The Orient Express began its service in the early 1880s as a trans-European luxury train. After 1945 the trains lost their prestige, but in 1970 a luxurious train service called Venice-Simplon-Orient Express began service (Culture Design Identity Railroad, Build Design Garden Railroad).
German inventor Franz Kruckenberg designed the track zeppelin in 1930. A unique development in the history of rail transportation, this car resembled an airship, ran on tracks like a train, and used propellers to increase speed. The propellers helped the track zeppelin achieve speeds of more than 160 km/h (100 mph) (Culture Design Identity Railroad, Build Design Garden Railroad).