Work will affect services around Cardiff Queen Street (Image: Transport for Wales)
People are being urged to check before they travel this August bank holiday as work continues on the South Wales Metro.
Transport for Wales has warned that engineering works, which are starting on the August bank holiday, will disrupt services at Cardiff Queen Street station until November.
The engineering works will take place intermittently.
Rail replacement buses will be operational, and information posters will be displayed at affected stations.
The work is part of the transformation of the Core Valley Lines, part-funded by the European Regional Development Fund through the Welsh Government.
The project aims to enable faster, more frequent services between Cardiff and the valleys.
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