The Mayor of Barmouth spoke to ITV News Wales about the upcoming closure
Rail passengers in Gwynedd are facing a major diversion as work is set to close a line for three months.
People in Barmouth will mostly be affected as the Cambrian Coast line closes for renovation works on Barmouth Bridge.
Which rail lines are affected?
Hereford and Shrewsbury
Llanwrtyd / Llandrindod and Shrewsbury
Replacement buses will run instead, TfW said.
Trains that usually run between Cardiff Central and Holyhead will run between Shrewsbury and Holyhead only.
The Mayor of Barmouth, Cllr Owain Pritchard, told ITV News Wales that closing the bridge has a "sizeable impact" because of the importance and impact of the railway.
Cllr Pritchard added: "We understand the importance of the bridge and the investment Network Rail is putting in place will secure its future."
Passengers are being urged to check the rail operator's website or National Rail's journey planner before travelling.
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