The staged programme of works worth an estimated £50m will start this summer with completion by summer 2017.
The Crossrail ‘west outer’ track infrastructure contract includes detailed design, installation and commissioning of new upgraded tracks.
Balfour Beatty will also lower tracks under several bridges to enable clearance for the overhead lines for the new electric trains and carry out minor overhead line equipment and electrical upgrade works.
Jorge Mendonça, Network Rail’s Crossrail Programme Director said: “Network Rail is undertaking a major upgrade of the existing rail network for Crossrail, including a significant programme of track renewals as well as station improvements.”
Network Rail is responsible for the design, development and delivery of the parts of Crossrail that are on the existing network.
The work includes upgrading 43 miles of track as well as improving 27 stations from Maidenhead in the west to Abbey Wood and Shenfield in the east.