Romford–Upminster line

The Romford–Upminster line is a railway branch line in Greater London. It connects , on the Great Eastern Main Line, to Upminster, on the London, Tilbury and Southend Line and London Underground. The route is long and there is one intermediate station at Emerson Park. The line is single-track throughout and is electrified at 25 kV AC. The speed limit is .
As of May 2015 services are operated by London Overground. There are two trains per hour in each direction. The timetabled journey time from one terminus to the other is nine minutes. It is completely separated from the rest of the London Overground.