Suburban commuter train arriving at Vakas station near Oslo, Norway, Scandinavia, Europe

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

High rise developments by Mahalaxmi Station and the Western Railways train of the Mumbai Suburban Railway, India

Suburban train, Ivry-sur-Seine, Ile-de-France, France, Europe

A blur of trains arriving and leaving London's Waterloo train station at dusk during rush hour.

Zoom view of trains leaving London's Waterloo train station.

View of London's Waterloo train station.

View of London's Waterloo train station.

Intercity-Express train, ICE, and a regional train, suburban train, on the track, railway, track network next to the main railway station in Essen, Essen, North Rhine-Westphalia, Germany, Europe

Suburban train on the track, railway, track network next to the Essen main railway station, Essen, North Rhine-Westphalia, Germany, Europe

Overgrown platform, train passing, Duisburg-Ruhrort suburban train station, North Rhine-Westphalia, Germany, Europe