British engineering group Costain has secured a £75m contract from Network Rail to electrify the Edinburgh Waverly to Glasgow Queen Street Railway.
Costain will electrify the main Edinburgh to Glasgow route through Falkirk High.
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This will include route clearance works at Winchburgh Tunnel, rail infrastructure works at Glasgow Queen Street and Edinburgh Waverley Station, and extensions to platforms at Linlithgow, Polmont, Falkirk High and Croy.
The Glasgow to Edinburgh through Falkirk Line is a mainline railway line linking Glasgow and Edinburgh through Falkirk in Scotland.
Costain CEO Andrew Wyllie said: "We are delighted to secure a further electrification contract from Network Rail as part of an alliance to improve the strategically important transport corridor in Scotland.
"This repeat appointment reflects the success of our approach whereby we form long-term, strategic partnerships with our customers to deliver a broad range of services across the full life cycle of their assets."
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By GlobalDataCostain will start the contract immediately with developing in-depth plans for the electrification, while engineering works will begin in June.
The contract is part of an alliance to deliver the £650m Edinburgh to Glasgow Improvement Plan (EGIP).
According to Transport Scotland, the Haymarket Tunnel was electrified and new services were introduced on the Edinburgh Glasgow through Shotts and Carstairs lines as part of the EGIP programme.
After the completion of electrification of the core Glasgow-Edinburgh through Falkirk High line in December 2016, seven-car electric trains will be phased in over the following months, replacing the outgoing six-car diesel units. Eight-car trains are planned for launch in December 2018.
