Dampflokwerk Meiningen (Germany) - Maintenance of steam locomotives and other steam vehicles, snow ploughs and historical passenger carriages. Information and technical data about German steam locomotive classes. GBM Gleisbaumechanik Brandenburg/H. GmbH - Modernisation and construction of components for light rail vehicles, freight and passenger trains. Sersa Group - Flexible excavation, loading and transportation of ballast, gravel. Healey Railroad Corporation - Provider of railroad materials and full service construction and repair of railroad track. Great Plains Rail Line Contractors - Track maintenance, construction, inspections and snow removal. Jock Valley Engineering - Provides engineering services relating to railway infrastructure including crossings, tracks, bridges, and signals. Railworks Corporation - Provides rail system services, including construction and rehabilitation, repair and maintenance, and related products. (Nasdaq: RWKS).