No trains will run in or out of Oxford railway station for more than two weeks in July due to maintenance work.
Engineers will replace track, signalling and cables.
There will be disruption from 29th June to 29th July, and no trains will use the station between 6th July and 23rd July.
Work will take place “around the clock” and has been “carefully planned” to minimise disruption to passengers, Network Rail said.
A spokesperson said the work “will allow trains to run faster and more effectively through Oxford, reducing congestion and speeding up journey times.”
All mainline services run by Great Western Rail (GWR) and Chiltern Rail into Oxford between Didcot Parkway, Oxford Parkway, Banbury and Moreton-in-Marsh will be affected, with bus replacement services operating at all stations instead.
The station building itself will remain open during the works.