Key Points
- Cardiff Council has approved Transport for Wales’ (TfW) proposal for a temporary construction hub at Roath Dock Road to support upgrades at Butetown’s new station, Cardiff Bay station, and Cardiff Queen Street station.
- The hub will primarily store equipment and machinery, include offices, welfare facilities, contractor parking, and assembly areas, with use permitted until 30 November 2027.
- Approximately 30 heavy goods vehicles (over 3.5 tonnes) expected daily during peak construction due to limited space near the stations.
- Original station works approved in August 2022 to modernise public transport, improve connectivity, support more services at higher quality, including electrification for new tram-trains.
- Site previously a disused car park leased to TfW; no significant ecological value, mostly tarmac with scrub vegetation; no unacceptable impacts on area character, residents’ amenities, or highway safety per officer report.
- Roath Dock compound used for strategic management, material storage, welfare; no physical work on site itself; lighting and noise mitigation in place.
- Bay line transformation part of South Wales Metro’s Core Valleys Lines (CVL), with new two-platform Butetown station north of Loudoun Square, second platform and enhancements at Cardiff Bay.
- Engineering works ongoing: new track into platform 2 at Cardiff Bay, sheet piling at Butetown, overhead line equipment (OLE) installation; line closures e.g., May 2025 for works.
- Benefits include faster, more frequent services (up to 6 trains/hour), quieter electric tram-trains, economic growth, reduced car use; expected completion around 2025, new timetable from then.
- Dan Tipper, TfW Chief Infrastructure Officer, called it “the biggest upgrade to public transport in the Butetown and Cardiff Bay area for a generation”.
- Safety warnings on OLE (25,000 volts), trespassing fines £1,000; piling noise 20-60 minutes per pile; 24/7 works possible with noise/light mitigation.
- Replacement buses during closures; no compensation for disruption as publicly funded project.
Butetown (Cardiff Daily) February 11, 2026 – Cardiff Council has greenlit a key proposal from Transport for Wales to establish a temporary construction hub at Roath Dock Road, advancing major upgrades to the city’s metro network including a new station in Butetown, alterations at Cardiff Bay station, and works at Cardiff Queen Street.
What Has Cardiff Council Approved?
Cardiff Council has approved Transport for Wales’ use of a temporary site at Roath Dock Road as a construction compound. As reported by Kieran Molloy of Nation.Cymru, the main function is storage of equipment and machinery, with the site earmarked for use until 30 November 2027. The application states: “The nature of the proposal is that of an employment-generating use as it would support the construction upgrade works at Cardiff Bay Station and the new station at Butetown.”
The officer’s report concludes: “It is concluded that the proposal would have no unacceptable impacts upon the character of the area, the amenities of nearby residents or highway safety.” Previously a disused car park leased by the council to TfW—now expired—the site comprises tarmac hard standing with low-lying scrub and holds no significant ecological value.
Planning documents note insufficient space next to Butetown and Cardiff Bay stations made Roath Dock Road appropriate. During peak construction, approximately 30 heavy goods vehicles daily are anticipated, alongside offices, welfare buildings, contractor parking, and general construction areas.
Why Is the Construction Hub Needed?
The hub facilitates the broader South Wales Metro project, part of Core Valleys Lines transformation. TfW’s FAQ explains: “We’ve constructed a compound near Roath Docks as part of our work to update the railway. This compound will allow us to strategically manage our work to deliver your Metro, store materials for future use and provide essential welfare facilities for our colleagues. There will be no physical work taking place at the site.”
Due to occasional 24/7 operations, lighting is directed away from nearby Adventurer’s Quay residences, with sound baffling for noise. The compound supports activities for Cardiff Bay and Butetown stations, remaining until spring 2025 per earlier plans, now extended.
Which Stations Are Being Upgraded?
Key sites include the new two-platform Butetown station in northern Butetown, opposite Maria Street north of Letton Road underpass; redevelopment of Cardiff Bay with a second platform, new signage, customer screens; and changes at Cardiff Queen Street for increased capacity (16 to 18 trains/hour).
As per TfW, a 2021 review positioned Butetown station for better community access and east-west crossing at Loudoun Square, complementing Cardiff Bay for amenities. Original approvals came in August 2022 for new platforms, accesses, and east-west route changes.
What Recent Engineering Works Have Occurred?
In May 2025, TfW closed the Bay line from 10 to 25 May for engineering. Dan Tipper, Chief Infrastructure Officer at TfW, stated: “The Bay Line transformation will see the biggest upgrade to public transport in the Butetown and Cardiff Bay area for a generation and is an important part of the South Wales Metro. This round of engineering works will be an important step in the project’s delivery, seeing us make headway on the development of a brand-new station in Butetown and the redevelopment of Cardiff Bay station.”
Works included new track into Cardiff Bay’s platform 2 (replacing platform 1 temporarily), sheet piling at Butetown, and overhead line equipment (OLE) wiring for tram-trains. From 26 May 2025, access shifted to platform 2 from Lloyd George Avenue, closing Bute Street entry.
Earlier phases from 2023 involved vegetation management, haul roads, surveys. Piling for OLE (7-10m structures, 50m apart) occurs day/night, each pile 20-60 minutes.
How Will Services Improve Post-Upgrade?
Upgrades modernise the network for higher-quality services and better connectivity. TfW outlines: faster journeys, 6 trains/hour (from 4), double track, new timetable from 2025; Class 398 Stadler Citylink tram-trains (3 carriages, 126 seats, 256 capacity) on battery from Queen Street to Butetown, OLE beyond.
Bay line integrates as tram/light rail, electrified for greener, quieter operation, reducing CO2 and road congestion, boosting economic growth.
What Disruptions and Safety Measures Are in Place?
Expect night works, piling noise, road closures, timetable changes, replacement buses (e.g., during closures, Pontypridd-Cardiff Bay services affected). From early 2023, compounds on Lloyd George Avenue provided welfare; workers arrive in crew vans, no on-street parking.
Safety: OLE carries 25,000 volts—fatal risk; no trespassing (£1,000 fine); avoid umbrellas, rods near lines. Two pedestrian crossings planned at Butetown and between Bay/Letton Road (20-30mph speeds). TfW hosts school workshops.
When Is Completion Expected?
Improvements started early 2023, full Bay line around 2025, new timetable then. Hub to 2027 aligns with Queen Street works. Funded partly by European Regional Development Fund via Welsh Government.
TfW urges checking journeycheck.com/tfwrail; more at tfw.wales/bayfaqs or engagement pages.
This development marks steady progress in Cardiff’s metro ambitions, enhancing transport for Butetown, Bay, and beyond.
