...that the failed Soviet opposed-piston 2-10-4 experiment in 1949 was an attempt to balance the driving forces on the wheels, allowing the counterweights on the wheels to be smaller and reducing "hammer blow" on the track?
...that as a result of the first Operation Lifesaver safety awareness campaigns in 1972, the number of grade crossing-related fatalities in Idaho dropped by forty-three percent in 1973?
...that RhB, operating most of the railways in the south-easternmost canton of Graubünden, has the largest network of all the private railways in Switzerland?
...that one of the systems proposed to resolve the problem of dual gauge for Africa uses four rails in the track to provide gauges of 4 ft 8½ in, (1435 mm, standard gauge on most of the world's railways), 3 ft 3.375 in, (1000 mm) and 3 ft 6 in (1067 mm)?
...that a type of diesel-electric multiple unit nicknamed "Thumpers" (after their characteristic sound) was widely used in south-eastern England as a stop-gap to serve lines that were shortly to be electrified?
...that Hong Kong Tramways is one of only two tramways in the world which provide regular operation of double-decker trams, and is the only system run exclusively with double-deckers?
...that because much of the route of Manchester Metrolink was formerly main line railway, the stations on the former railway routes have normal platforms about 900 mm (35 inches) above ground level; consequently the new stops built in the city centre also have 900 mm high platforms?
...that since the great dieselization era of the 1940s and 1950s, many roundhouses have been demolished, but a few still stand and remain in use on the railroads or have been converted for other uses?