Home›25 kV AC railway electrification›自由線🌐中文EnglishDeutschFrançaisItalianoNederlandsفارسی中文日本語EntityQ7363198· pop 7· linked from 702 articles自由線Also known as Romford–Upminster line, ROU, Romford to Upminster Line倫敦地上鐵路線Wikidata factsImageLO Class 710 passing Butts Lane FC near Emerson Park, 2021.jpgLength3.375Show 3 more factsCommons categoryRomford to Upminster Linedate of official opening1893-06-07sRGB color hex tripletE87722Sources (3)railwaycodes.org.uks-r-s.org.ukrailwaycodes.org.ukvia Wikidata · CC0Available in 6 languagesDeutsch中文Italianosimpleفارسیvia Wikidata sitelinks · CC0ConnectionsFenchurch Street railway stationEntityGospel Oak to Barking LineEntityCategories25 kV AC railway electrificationLondon Overground infrastructureRailway branch linesRailway lines in LondonRailway lines opened in 1893Standard gauge railways in LondonTransport in the London Borough of Havering