The £400m improvement will take four years to complete but should help cut delays to rail passengers in the West Country by 50%.
The upgrade will also support the 10-year plan to expand services on the Great Western main line, catering for the 51% forecast increase in rail demand by the end of the decade. This signalling upgrade is the first core package of work in a wider £5bn plan to transform the Great Western main line.
Network Rail Western route managing director Patrick Hallgate said: “We are safeguarding the long-term future of a vital rail artery in the southwest of England and Thames Valley. The Great Western main line is running out of room with nearly 30m journeys and a growth rate of at least 5% each year. A robust and modernised signalling infrastructure is vital to cope with this burgeoning growth.
“In a few years’ time, the signalling infrastructure will be considered life-expired but we are ahead of the game by starting the improvements now. This programme is a vital building block for the transformation of Great Western, boosting performance, paving the way for electrification and supports major enhancement plans in Bristol, Swindon, Oxford, Reading and Newbury.”
The improvement will be carried out in five stages, starting from the Didcot area, to minimise disruption. Invensys is the main contractor to deliver the work in the Didcot area.
The biggest programme of work will be carried out in the Bristol area, which is forecast to experience the highest number of passenger growth of 44% in the next decade. Around £150m will be invested in upgrading the signalling infrastructure in the area. The programme of work is designed to complement the capacity-boosting proposal to revamp the railway track around Bristol Temple Meads.
Around £50m will be invested between Swindon and Chippenham and Swindon and Gloucester as part of this scheme. This work will complement the scheme to redouble the track between Swindon and Kemble.
Around £20m will be invested in upgrading the signalling between Newbury and Reading. As part of this programme, work will be carried out to upgrade existing tracks to allow passenger trains to run. This will enable better train movement and potentially allow more trains to run, especially in times of congestions on race days at Newbury.
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