Train passengers are being warned to expect disruption to their journeys over the next six weeks because of the closure of the Selby swing bridge.
The bridge, which opened in 1889, is part of the main Hull to Leeds railway line and is undergoing an £8m upgrade.
Phil Verster, route managing director for Network Rail, said: "Selby swing bridge has given many years of excellent service but the structure and the hydraulics are due significant refurbishment.
"We're investing £8m on steelwork repairs, work to the hydraulics on the swing span, waybeam replacements and wholesale grit blasting and painting of the entire structure. Once the work is completed the structure should be maintenance free for 25 years and we will be able to run trains at line speed, removing a speed restriction."
All TransPennine Express services will terminate at Selby during the closure, with buses laid on for passengers travelling to and from Hull. Services to London, run by First Hull Trains and East Coast, will be diverted via Goole.
The bridge strengthening work, rescheduled from last summer, is said to be vital to extending the life of the river crossing. The delay was caused by disruption to the regional rail network following a landslip at Hatfield colliery.
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