SL4 | |
---|---|
![]() | |
Overview | |
Operator | Blue Triangle (Go-Ahead London) |
Garage | Henley Road |
Vehicle | BYD BD11 |
Peak vehicle requirement | 18 (April 2025) |
Began service | 7 April 2025 |
Route | |
Start | Grove Park |
Via | Lee Blackheath Leamouth Canary Wharf |
End | Westferry Circus |
Length | 7 miles (11 km) |
Service | |
Level | Daily |
Frequency | Every 8-15 minutes |
Journey time | 38-63 minutes |
Operates | 05:00 until 01:34 |
London Buses route SL4 is a Transport for London contracted Superloop express bus route in London, England. Running between Grove Park and Westferry Circus, it is operated by Go-Ahead London subsidiary Blue Triangle.
The service is one of three bus routes to run through the Silvertown Tunnel, alongside route 129 and the Silvertown Tunnel cycle shuttle. [1]
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]
Route SL4 operates via these primary locations: [10]
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]
Media related to London Buses route SL4 at Wikimedia Commons