The Blackwall Tunnel is a pair of road tunnels underneath the River Thames in east London, England, linking the London Borough of Tower Hamlets with the Royal Borough of Greenwich, and part of the A102 road. The northern portal lies just south of the East India Dock Road (A13) in Blackwall; the southern entrances are just south of The O2 on the Greenwich Peninsula. The road is managed by Transport for London (TfL).

The A13 is a major road in England linking Central London with east London and south Essex. Its route is similar to that of the London, Tilbury and Southend line via Rainham, Grays, Tilbury, Stanford-Le-Hope & Pitsea, and runs the entire length of the northern Thames Gateway area, terminating on the Thames Estuary at Shoeburyness. It is a trunk road between London and the Tilbury junction, a primary route between there and Sadlers Hall Farm near South Benfleet, and a non-primary route between there and Shoeburyness.