Freig Work Trains Classic diesels and electrics carry trains over the road. Other trains do the work that keeps the railroad running.
Switchers are smaller locomotives who work in freight yards and passenger stations.
They move freight and passengers cars around the yard, switching them to other tracks so they can be assembled into longer trains. The green switcher here and the black Staten Island switcher on the other page are those normally seen in freight yards, although many have been replaced by road switchers. The smaller switchers are used in small yards and stations with tighter curves and less room. Switchers only carry a few cars, and small switchers might only carry one car at a time. Railroads in America need snowplows to keep the tracks clear.