Network Rail has confirmed engineers will work round the clock to replace the Danby, Duck, Thorneywaite and Carr Lane bridges on the Esk Valley line between Middlesbrough and Whitby.
The £2.1m scheme is being carried out during the half-term holidays and the Jubilee celebrations as the line is used by hundreds of pupils each day during term-time.
Network Rail has already confirmed major engineering works will not take place during the London Olympics this summer.
Network Rail’s route managing director, Phil Verster, said: “This decision to schedule the works during the Jubilee weekend was not taken lightly. These bridges are nearing the end of their life and need to be replaced.”
Northern Rail trains on the line will be disrupted for nine days from Saturday. All other works are being completed while trains are running.
The North Yorkshire Moors Railway will run extra services to Whitby during the work as it operates a different route.
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