Transport for London has shortlisted Balfour Beatty, BAM Nuttall, Costain, Hochtief and Skanska for a major programme of bridge and tunnel strengthening in the capital.
The biggest project will be phase two strengthening of the Hammersmith Flyover, which was closed last year amid fears it could collapse after extreme corrosion of post tensioned cables was unearthed.
The A4 flyover is now open but needs further remedial works to strengthen the key access route in West London.
The £200m programme also includes refurbishing the Grade II listed Chiswick bridge over the Thames and four important rail/road bridges.
The framework of firms will be appointed on an early contractor involvement basis before work for the three main work packages is called off.
Dana Skelley, Director of Roads said: “Early contractor involvement enables us to achieve best value for money by getting the wisdom of construction experts at the beginning of project development, helping to remove risks which are sometimes not considered early enough in traditional delivery models.
“By using this method, we can ensure we complete these important works efficiently and successfully, with minimum disruption to London’s road users.”
Around 200 apprentices will be trained as part of the deal to support a trainee per £1m spent.