three tracks; the eastbound Piccadilly line track is the only track that is unable to serve the station. On 5 January 1964 an automatic ticket barrier was installed at the station at a cost of around £1000. It was the first such barrier to be installed anywhere on the London Underground. The ticket-checking device itself was simplistic, optically scanning a printed ternary code on each ticket to check for validity, and had a theoretical maximum throughput of 30 tickets per minute. Nonetheless, the device was seen as a large improvement over manned barriers with staff checking tickets, and the experiment was expanded to other local stations Chiswick Park and Ravenscourt Park. Gallery Connections London Buses route 237 serves the station directly, while routes 110, 190, 267, H91 and night bus route N9 run along Chiswick High Road and King Street, about 300 yards south of the station. References External links London Transport Museum Photographic Archive District line stations Tube stations in the London Borough of Hounslow Former London and South Western Railway stations Railway stations in Great Britain opened in 1912 1912 establishments in England