Bristol Parkway station is set to be shut to commuters for two weeks from Saturday, 2nd September to Friday, 15th September.
The closure is due to a project to upgrade the Great Western mainline, allowing for their new intercity trains to run, as well as to build a new platform.
A number of services have already been changed or diverted, since Saturday, 19th August.
The closure means:
Services between Parkway and Swindon will be halted for around a month
Services between Cardiff, Swansea and London Paddington will be affected
Local services between Yate and Filton Abbey Wood will also be affected
Electrification work will also be taking place in the Chipping Sodbury and Alderton tunnels, along with the installation of overhead equipment at Parkway station. A flood resilience scheme will also be commenced at Chipping Sodbury.
Great Western Railway (GWR) say their Intercity Express Trains will deliver over a fifth more seats per train, more frequent services and reduce journey times.
Scheduled replacements include:
High speed services calling at Patchway instead of Bristol Parkway (services will be reduced during the off peak)
Replacement buses running between Bristol Parkway and Patchway
Local services between Yate and Filton Abbey Wood being replaced by buses
CrossCountry trains will be diverted, calling at Patchway instead of Bristol Parkway
Trains will continue to run between Yate and Gloucester, and Filton Abbey Wood and Bristol Temple Meads.
There will be a replacement bus service running between Parkway and Patchway, as well as Filton Abbey Wood and Yate.
On weekends from 23rd and 24th September until 18th and 19th November, there will be further improvement work affecting South Wales and Bristol Parkway services.
The engineering works are scheduled to last around six weeks, until the 29th of September.
Commuters are advised to check their journeys and routes on the Great Western Railway website.