In the UK, the London, Brighton and South Coast Railway pioneered overhead electrification of its suburban lines in London, London Bridge to Victoria being opened to traffic on 1 December 1909. Victoria to Crystal Palace via Balham and West Norwood opened in May 1911. Peckham Rye to West Norwood opened in June 1912. Further extensions were not made owing to the First World War. Two lines opened in 1925 under the Southern Railway serving Coulsdon North and Sutton railway station. The lines were electrified at 6.7 kV 25 Hz. It was announced in 1926 that all lines were to be converted to DC third rail and the last overhead electric service ran in September 1929.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): All lines were converted to DC fourth rail in what year?
unanswerable
I Storbritannien var London, Brighton och South Coast Railway pionjärer för överelektrifiering av sina förortslinjer i London, London Bridge till Victoria öppnades för trafik den 1 december 1909. Victoria till Crystal Palace via Balham och West Norwood öppnade i maj 1911. Peckham Rye till West Norwood öppnade i juni 1912. Ytterligare utvidgningar gjordes inte på grund av första världskriget. Två linjer öppnade 1925 under Southern Railway som betjänade Coulsdon North och Suttons järnvägsstation. Linjerna elektrifierades vid 6,7 kV 25 Hz. Det meddelades 1926 att alla linjer skulle byggas om till DC tredje järnväg och den sista överliggande eldriften kördes i september 1929. Om det är möjligt att svara på denna fråga, besvara den för mig (annars, svara "osvarbart"): Alla linjer byggdes om till DC fjärde järnväg under vilket år?
In the United Kingdom, the London, Brighton and South Coast Railway pioneered over-electrification of their suburban lines in London, the London Bridge to Victoria was opened to traffic on 1 December 1909. Victoria to Crystal Palace via Balham and West Norwood opened in May 1911. Peckham Rye to West Norwood opened in June 1912. Further enlargements were not made due to World War I. Two lines opened in 1925 under the Southern Railway serving Coulsdon North and Sutton railway station. The lines were electrified at 6.7 kV 25 Hz. It was announced in 1926 that all lines would be converted to DC third railway and the last overhead electric drive was run in September 1929. If it is possible to answer this question, answer it for me (otherwise, answer "unanswerable"): All lines were converted into DC's fourth railway in what year?
Osvarsbart
Unanswerable