The new £500m framework will see the trio working with TfL to design and build some of London’s most high-profile and complex road improvement projects.
The framework will help deliver a wide range of projects to transform highways, reduce dangers on the roads, improve journey reliability and encourage cycling and walking.
Schemes delivered using the framework are likely to include projects such as the proposed Fiveways scheme in Croydon and the removal of the Vauxhall gyratory, as well as major asset renewal and upgrades like the A40 Westway structure.
Nick Fairholme, TfL’s director of projects and programmes, said: “We are delighted to be working with Costain, Morgan Sindall and Skanska over the next four years on a range of high profile and complex civil engineering projects.
“Each contractor brings something unique to the table and all have experience in designing and building major schemes, which will ensure Londoners get these key projects delivered in the most effective and efficient way.”