Monday 5 Jun 2023
Carstairs Junction fully reopened
- Region & Route:
- Scotland’s Railway: Scotland
Network Rail has completed a 12-week phased programme of work to remodel Carstairs junction.
All lines through the key junction on the West Coast main line are now open and operators will again be able to run a full timetable of services, including over weekends.
It was all part of a £164m Scottish Government investment to fully remodel the junction, making it more reliable and better able to cope with future passenger and freight demands.
New track sections, overhead lines, signalling and telecoms were installed, with improvements to station platforms, embankments and drainage across the junction.
The logistical challenge was immense with safety – as always – the key priority. Around 300 people and a mix of engineering trains, rail vehicles, construction plant and machinery all carried out work on site on a daily basis.
Throughout the closure, Network Rail and freight operators kept supply chains moving on the railway rather than by road, reducing the potentially negative environmental impact.
This involved diverting around 1,000 freight trains, equating to some 360,000 tonnes of goods, to keep store shelves stocked and production lines operating.
Jim McCleary, Network Rail’s project lead for the remodelling of Carstairs Junction said: “Closing such a key junction on a critical cross-border route has been a massive undertaking for everyone involved in the project - and for the rail industry generally.
“Incrementally over the 12-week period we’ve re-opened the new, modernised railway at Carstairs - delivering greater reliability, flexibility and increasing line-speeds to this critical junction on the West Coast main line.
“The volume of work achieved during the line closure was huge and could not have been delivered practically or efficiently in any other way.
“By completing this crucial upgrade work we have improved the capabilities of the junction, providing better future journeys for passengers and more capacity for freight.
“We’re grateful to passengers for their patience during this work. We appreciate it has been inconvenient but with services now returning to a full timetable, we hope that passengers enjoy the benefits this investment in the railway has delivered.”
Barry Milsom, Executive Director of Operations and Safety at Avanti West Coast said: “We’re pleased to be reinstating our direct weekend services between London and Scotland from Saturday 10 June following the completion of the Carstairs Modernisation Project. We’d like to thank our customers for their patience over the past three months while Network Rail carried out these major improvements.
“The work to renew the track, signals, and overhead lines on a key section of the West Coast main line will make cross-border journeys more reliable for customers travelling to and from Scotland for many years to come.”
Notes to Editors
Project information
In advance of the project, the had already delivered more than one million hours of preparatory work – developing the scheme, preparing the site and building the backbone of the modernised signalling and overhead line systems.
Essentially work to de-risk activities during the line closure and maximise the amount of work that could be delivered with the extended access to the junction.
Within the 88-day engineering access, circa 300 people per day supported delivery of the project. During this time, a further 500,000 hours were delivered to complete the work
During the first phase of the project – between Saturday March 4 and Sunday March 19 - there were no direct services to Glasgow Central and Edinburgh on the West Coast main line through Carstairs.
Phase two of the work Monday March 20 and Friday April 21, saw part of the junction re-opening to allow some trains to run directly to Edinburgh – and via diversion routes to Glasgow – on weekdays.
The final phase, between Saturday April 22 and Sunday June 4, will saw services return to normal during weekdays with the junction fully closed each weekend.
The closure of the junction affected cross-border operators including, Avanti West Coast, Caledonian Sleeper, CrossCountry Trains, London North Eastern Railway and TransPennine Express. During closure, they operated via diversionary routes or alternative journey options during this
There were no ScotRail services to or from Carstairs for the full three-month period. Carstairs station reopened on Tues May 30 as planned
Carstairs junction sits 26 miles to the south-east of Glasgow on the West Coast main line. Currently the junction requires regular maintenance work as much of the infrastructure through the area is reaching the end of its operational lifespan. Speed restrictions are often imposed which can affect performance.
The layout of the junction was no longer suited to today’s pattern and volumes of service. 200+ services pass through the junction on an average midweek day.
Enabling works for the project have been underway since 2020 and the work delivered during the line closure will see over 200 engineers working 24/7 to upgrade the junction.
The new power supply installed will allow engineers to switch off the overhead lines remotely to carry out maintenance, reducing the amount of time the railway is closed in future. The improvements will also bring reduced overall journey times.
Project delivery in numbers
Track |
Duration 88 days |
Staff 300 per day |
Hours worked 500,000 |
Track |
Track installed 9,200m |
Switches & Crossing (S&C) units installed 27 |
Welds 753 |
Trains / Tampers: |
Engineering Trains utilised 119 |
Tamping Shifts 41 |
Materials used/removed: |
Spoil 55, 650T |
Sand 11,500T |
Type 1 844T |
Ballast 43,635T |
Geotextiles 30.5km (inc. 7.8km of geocell) |
Sleepers 11,280 |
Closures/IBJs 2.3Km |
Wiring |
Removed 16,982 |
Installed 23,026 |
OLE Structures |
Removed 64 |
Installed 410 cantilevers |
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