The 3km line will branch off from Gallions Reach in the Royal Dock area and run on a viaduct through Beckton Riverside before diving into a 1.5km twin-bore tunnel under the Thames to reach a new elevated station in Thamesmead town centre.
Two new stations are planned. One will sit at the heart of the Beckton Riverside development, the other at Thamesmead Waterfront on Peabody’s 100-hectare regeneration site.
The scheme is expected to support 30,000 new homes and deliver a £15.6bn boost to the London economy.
TfL is inviting contractors, designers and suppliers to help shape the delivery model for the project.
Firms will be asked for feedback on buildability, phasing and early contractor involvement before the formal tendering process begins next year.
The London transport project is still subject to full Treasury approval, with hopes that the Chancellor will formally back the scheme in the forthcoming Autumn budget.
