The Rotherhithe Tunnel is a road tunnel under the River Thames in East London, connecting Limehouse in the London Borough of Tower Hamlets north of the river to Rotherhithe in the London Borough of Southwark south of the river, designated the A101. It was formally opened in 1908 by George, Prince of Wales, and Richard Robinson, Chairman of the London County Council. It is an extremely rare example of a road tunnel where road traffic, pedestrians and cyclists all share the same tunnel bore. Transport for London took over ownership and maintenance of the tunnel in 2001.
It should not be confused with the nearby earlier more historic Thames Tunnel, designed and built under the supervision of Marc Isambard Brunel and his son Isambard Kingdom Brunel, used by London Overground for the East London Line.
Wikipedia https://en.wikipedia.org/wiki/Rotherhithe_Tunnel
Coordinates 51°30'24.587" N -0°2'51.135" E