Work will begin to protect a historic Lancashire railway viaduct over Christmas.
Rail passengers are being urged to check before they travel over the festive period, as the work will involve some disruption to services.
The work is part of a £160m programme of investment in three sites across the North West.
As part of the Great North Rail Project, work will continue on the transformation of Liverpool Lime Street station, £3m will be spent replacing track at Manchester Piccadilly station and £1.8m will be spent to protect and preserve the iconic Wyre Viaduct near Scorton.
Martin Frobisher, managing director for Network Rail’s London North Western route business, said: “Tens of thousands of customers in the north are seeing their train journeys transformed by the Great North Rail Project. This is happening right now. It’s incredibly exciting.
“The railway is up to 50 per cent quieter than usual during the festive period.
“By carrying out this kind of must-do work over the Christmas break we impact as few people as possible.”
Rail Minister Paul Maynard said: “We’re committed to making rail travel in the North of England faster, more comfortable and more reliable for customers throughout the region. Upgrades to Wyre Viaduct and the Manchester Piccadilly and Liverpool Lime Street stations, are crucial components in a once-in-a-generation programme of upgrades that are going to transform travel in the North, with more new services and space for an extra 40,000 more passengers a day.”
Chris Nutton, Major Projects Director for TransPennine Express said: “I would encourage anyone using trains over the festive period to plan ahead and check before they travel.”
A breakdown of how journeys will be affected can be found at www.nationalrail.co.uk/Christmas