Construction of a covered walkway linking a new £20million car park to Didcot Parkway Station will lead to a much-used cycle path being closed for a year.
Vegetation is being cleared this week on the route along Station Road, between Foxhall Bridge and Didcot Parkway Station, to allow reconstruction of the footbridge.
Work began at 7.30am on Monday and is expected to be completed by 5pm tomorrow.
Following consultation with sustainable transport charity Sustrans, it was decided the cycle path should remain closed until early 2019 while the new footbridge is built.
Pedestrians can use the footpath to the south of the works while cyclists will have to use Station Road.
A Network Rail spokesperson said: “We recognise that construction work on the railway can be disruptive to those living or working nearby.
“The nature of our work often means some disturbance is unavoidable, but please be assured that every effort is made to minimise any unnecessary noise and we have reminded all staff to be considerate to our neighbours.”
The new covered footbridge is at the west end of the station and, when completed, will provide customers with a direct, covered walkway route from Foxhall Road car park to the station.