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London Buses route SL4
London Superloop express bus route From Wikipedia, the free encyclopedia
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London Buses route SL4 is a Transport for London contracted Superloop express bus route in London, England. Running between Grove Park station and Westferry Circus, it is operated by Go-Ahead London subsidiary Blue Triangle.
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The service is one of three bus routes to run through the Silvertown Tunnel, alongside route 129 and the Silvertown Tunnel cycle shuttle.[1]
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History
The route was first proposed by Transport for London in November 2022 as part of the Silvertown Tunnel bus network.[2][3] At the time of the consultation, the route was proposed to be numbered X239.[4]
In March 2023, it was confirmed that the route would be introduced as planned and would also be included as part of the then proposed Superloop express bus network.[5] In October 2023, it was confirmed that the route would be introduced using route number SL4.[6]
In 2023, the contract to operate the service was awarded to Blue Triangle, a subsidary of Go-Ahead London.[7][8]
Route SL4 was introduced on 7 April 2025, the same day as the opening of the Silvertown Tunnel.[9]
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Current route
Route SL4 operates via these primary locations:[10]
Operation
The route operates at a frequency of a bus every eight minutes on weekdays and every 15 minutes on weekends.[11]
Like all bus services using the Silvertown Tunnel, the service is operated using zero emission battery electric buses.[12] The service will be free to use for all passengers until at least April 2026.[13][14][1]
References
External links
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