Following the Plan’s proposal for the new section of motorway to the south of Newport, the Welsh Government has decided to modify the 2006 Preferred Route, which protects a corridor for planning purposes.
The modified 2014 Preferred Route (TR111) largely follows the 2006 Preferred Route (TR111). The 2014 Preferred Route (TR111) Plan can be downloaded below.
This takes into account the decision, as part of the Plan, to reclassify the existing M4 between Magor (Junction 23a) and Castleton (Junction 29) as a trunk road. This has enabled the earlier outline designs of the motorway interchanges at Magor/Rogiet (Junction 23) and Castleton, which were protected for planning purposes to be reviewed.
The review of the Magor/Rogiet junction has enabled the provision of a connection between the M4, M48 and the B4245. This would provide improved access to the Severn Tunnel Park & Ride Station, Caldicot and reduce the traffic travelling through Magor and Undy.
The opportunity has also been taken to review the intermediate junction locations to take into account the ongoing brownfield development at Glan Llyn on the east side of the River Usk and the regeneration proposals for central Newport on the west side of the River Usk.
The proposed intermediate junction on the east side of the River Usk near Glan Llyn would connect into the upgraded A4810 Steelworks Access Road (SAR) This would provide access to the ongoing housing development and the proposed business park and Llanwern railway station, part of the Cardiff Capital Region Metro proposals.
The proposed intermediate junction on the west side of the River Usk near the western boundary of Newport Docks would connect into the A48 Newport Southern Distributor Road (SDR). This would provide improved access to central Newport and the docks themselves.
For further information please see ‘M4 Corridor around Newport; Statement of Reasons for Modification of the 2006 Preferred Route’.
When a Preferred Route is announced, the Welsh Government serves a statutory notice (TR111) on the local planning authorities requiring the line to be protected from development.
Building on the strategic level appraisal undertaken to support the Welsh Government’s decision making on its Plan for the M4 Corridor around Newport, the documents below have informed the development of its Preferred Route:
• Business Case;
• WelTAG Stage 1 & 2 (scheme level) Appraisal Report;
• Design Manual for Roads and Bridges Stage 2 Report;
• Design Manual for Roads and Bridges Stage 2 Environmental Report;
• Economic Appraisal Report;
• Local Model Validation Report; and
• Traffic Forecasting Report.
A Statement of Reasons for Modification of the 2006 Preferred Route is provided below.
The statement summarises the Welsh Government's reasons for modifying the 2006 Preferred Route (TR111).
The Welsh Government serves a revised Statutory TR111 notice (superseding the one issued on 19th April 2006) to the Chief Executives of Newport City and Monmouthshire County Councils, which requires them to protect the route for planning purposes. This is now enacted under Article 19 of The Town & Country Planning (Development Management Procedure) (Wales) Order 2012. Following receipt of the notice the Councils should refer any planning application affecting land within 67 metres of the protected route or its connecting roads to the Welsh Government. They were also required to show the protected route in their Local Development Plans. The protected route should also show up as part of the local authority search procedure.
This business case outlines how the proposed new section of motorway to the south of Newport:
• is supported by a robust case for change that fits with wider Welsh Government objectives;
• demonstrates value for money;
• is commercially viable;
• is financially affordable; and
• is achievable.
Welsh Transport Planning and Appraisal Guidance is a transport appraisal tool applicable to transport projects, plans and programmes in Wales. The Welsh Government requires that major transport initiatives seeking government funding are appraised with this guidance. The M4 Corridor around Newport Plan has been appraisal at a strategy level. This document builds on previous strategy level appraisal to provide a scheme level of appraisal of the proposed motorway to the south of Newport.
This technical report provides a Design Manual for Road and Bridges (DMRB) Stage 2 assessment of route options that informed the development of a preferred route, in this case for the M4 Corridor around Newport Plan’s proposed new section of motorway to the south of Newport.
DMRB Stage 2 assesses a range of route options to inform the development of a preferred route, in this case for the M4 Corridor around Newport Plan’s proposed new section of motorway to the south of Newport.
DMRB Volume II is the guidance for the Environmental Assessment of Road and Bridge projects. This technical environmental assessment is for the purpose of DMRB Stage 2.
This technical report summarises the economic appraisal of the proposed new section of motorway to the south of Newport. It involves a calculation and comparison of the likely costs and benefits of the proposed new section of motorway to the south of Newport against different scenarios.
This technical report summarises the base year traffic model, which shows current travel conditions, and is the basis for undertaking traffic forecasting and economic appraisal of the proposed new section of motorway to the south of Newport.
This technical report summarises the traffic forecasting model of the proposed new section of motorway to the south of Newport.