DLW redirects here. For the DL&W railroad in the United States, see Delaware, Lackawanna and Western Railroad. For the light rail system in London, see Docklands Light RailwayThe Diesel Locomotive Works (DLW) in Varanasi, India, is a production unit owned by Indian Railways, that manufactures diesel-electric locomotives and its spare parts. It is the largest diesel-electric locomotive manufacturer in India.