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Dinas Powys Transport Network Study 

The Vale of Glamorgan Council has been working with an independent technical consultant to develop potential options for improving the transport network.

Dinas Powys to Merrie Harrier Bus Lane Opening event banner sizeThe study area encompasses the existing transport corridors from Biglis Roundabout, Barry through Dinas Powys, to Cardiff via Leckwith, Cogan and Penarth. The assessment of existing transport corridors shall consider the highway network and public transport within and immediately surrounding Dinas Powys.


The Study was required because of the high traffic flows experienced in the area with frequent traffic congestion causing delays and poor journey time reliability. Further, public transport in the area is at capacity during peak periods of travel and there are limited walking and cycling opportunities. The Study represents an exciting opportunity to improve the quality of connections by all transport modes between Dinas Powys and surrounding areas. 




A stakeholder workshop was undertaken on Tuesday 7th March 2017 at the Parish Hall, Britway Road, Dinas Powys to which representatives from key stakeholders from across the area representing key employers, public organisations, transport providers and local authority were invited.  


A public consultation event was held on Monday 13th March 2017 between 13:30 and 18:30 at the Parish Hall. The event afforded members of the public the opportunity to provide feedback on the identified options, opportunities, and constraints, as well as consideration and suggestions for the objectives and potential transport options.


The event was attended by members of the Arcadis project team and Vale of Glamorgan Council officers to facilitate discussion, with specific work stations and feedback forms provided to capture key information from attendees.


WelTAG Stage 1 Report

WelTAG Stage 1 Report - Cabinet Minutes


Welsh Government Local Transport Fund Application Forms



The WelTAG Stage One report considered the problems, opportunities and constraints, established objectives and appraised a long list of options. The Stage One study was presented to Cabinet whereby the following options were confirmed to be taken forward for further consideration, following recommendation by the Council’s Environment and Regeneration Scrutiny Committee on 14th September 2017.


  • Do-minimum
  • Bypass
  • Multi-modal option
  • Bypass and multi-modal option

A draft WelTAG Stage 2 report was subsequently presented to Cabinet on 18th February 2019.


Following the report additional considerations were identified for further investigation.  


The Vale of Glamorgan Council has provided funding of more than £50,000 to complete the WelTAG Stage 2 study into potential transport improvements in Dinas Powys.


Contractors Arcadis Consulting Ltd have been selected to carry out the work and the public will be consulted on its outcomes early next year. These could include improvements to active travel and public transport as well as the possibility of a bypass for the village. Specifically, the work will involve:

  • Engaging with Network Rail to understand the constraints and potential costs associated with constructing a bypass and junction in the vicinity of the existing railway tunnel.

  • Undertaking concept design, modelling and costing of suggested improvements to the Merrie Harrier junction to improve capacity. These will be considered in the context of costs associated with the pink and green route options.

  • Commissioning Transport for Wales to carry out strategic modelling using the South East Wales Transport Model of the bypass proposals.

  • Updating the economic appraisal for the green/pink route alignment and updating the transport case along with the Stage 2 report.

  • Undertaking public consultation on the findings of the Stage 2 report, finalising it and making recommendations to be taken forward to the WelTAG Stage 3 Full Business Case.