China migrant workers from the countryside waiting outside guangzhou train station, guangdong province

Workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Female workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Office workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Office workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Office workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Tourist and workers, firemen, Llanfair and Welshpool Steam Railway, Wales

Firemen, Vale of Rheidol Steam Railway, at Devil's Bridge Station, near Abertsywyth, Ceredigion, Wales

Male railway guard standing on a train Sri Lanka, Asia

woman roof worker with equipment on central railway station, Berlin

woman roof worker with equipment on central railway station, Berlin

Cutting free the railroad line of rank growth

Panorama ICE-depot Rummelsburg, Berlin, Germany

Worker walking along the railway-bridge crossing the river Yamuna, Agra, Uttar Pradesh, India, Asia

Track works, Heidelberg, Baden-Wuerttemberg, Germany, Europe

Engineer adding water to the Ansaldo 442 steam locomotive built in 1938, used for transporting cargo from the port city of Massawa to the capital Asmara, Arbaroba, Central Province, Eritrea

Silhouette of man on boxcar