The 7 and 7 Express, which use the Flushing Line through Midtown Manhattan, are colored purple.
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People need to be able to see and hear trains appropriately so they're able to stay safe. In Britain, historically train fronts were required to have a yellow panel in order to make them more visible, a move which came in the 1950s when newer diesel and electric trains were found to be far quieter than steam.
The Little Yellow Train of the Pyrenees, or Le Petit Train Jaune as it is known in French, makes the spectacular journey from Villefranche de Conflent to Latour de Carol, on a route as famous for its engineering prowess as it is for its stunning natural beauty.
The J Nassau Street Local and Z Nassau Street Express are two rapid transit services in the B Division of the New York City Subway. Their route emblems, or bullets, are colored brown since they use the BMT Nassau Street Line in Lower Manhattan.
This shows weekday service. Listed transfers are based on the weekday schedule and may vary. These routes might be different on weekends and late nights.
According to the MTA, much of the 7 line is elevated because the two divisions that operated it, the Interborough Rapid Transit (IRT) Company and the Brooklyn Rapid Transit Company (BRT), specialized in elevated railroads. The IRT and the BRT continued to build on this line up until 1928.
As a safety feature to warn anyone crossing the line on foot/in a vehicle (or near the railway) that there was a train approaching them. This includes areas where shunting is being carried out (such as in a freight marshalling yard).
Locomotives built before generally 1870 were painted with various colors and gold striped. After about 1970 to lower the expenses of locomotives they were painted black or dark to help hide the coal soot and make painting less expensive. Around 1870 is the switch from wood fuel to coal.