Nine contractors have secured places on 20 framework agreements with Network Rail worth £1.6bn over the next five years.
The deals cover an extensive programme of enhancements and renewals to the London North Western and East Midlands routes.
Network Rail’s infrastructure projects director, Rob Offord, said: “The awarding of these frameworks represents a significant milestone in the implementation of our new procurement and contracting strategy.
“This will bring improved safety, whole-life cost efficiency and delivery performance through collaborative relationships with a consolidated and strategically aligned supply chain.”
The awards by regions are: