The A4232, which is also known either as the Peripheral Distributor Road (PDR) (Welsh: Ffordd Ddosbarthu Ymylol) or the Cardiff Link Road (Welsh: Ffordd Gyswllt Caerdydd),[2][3][4] is a distributor road in Cardiff, the capital of Wales.
The first section of the PDR to be completed was the Southern Way Link Road in 1978 and the latest section was phase 1 of the Eastern Bay Link Road, known as Ewart Parkinson Road in 2017. When fully completed, the road will form part of the Cardiff ring road system.[5] The PDR runs west, south and east of Cardiff, with the M4 between junction 30 and junction 33 completing the northern section. The PDR is dual carriageway for its entire length except for Rover Way and the East Moors Viaduct, which is a single carriageway. The entire length of the road has clearway restrictions on it.
The PDR has been constructed in separate link roads of between 1.2km (0.75mi) and 5.47km (3.40mi) around Cardiff and to date 17.4 miles (28.0km) including spurs have been opened to traffic, with plans for a further 5.53km (3.44mi).[6] It has 5 large viaducts (Ely Viaduct, Grangetown Viaduct, Taff Viaduct, Eastern Bay Link Viaduct and the East Moors Viaduct), 1 tunnel (Queen's Gate Tunnel) and 2 spur roads (Cogan Spur and Central Link Road). The road has many grade separated interchanges.
The road was conceived in the early 1970s, and planning by South Glamorgan County Council began in the late 1970s. At that stage the road was planned to be completed by 1995 and would relieve Ely, Grangetown, Butetown and East Moors of through traffic and provide a fast link to the national motorway network via the M4 and A48(M).[7] The first section of the PDR to be completed was the Southern Way Link Road between Newport Road (A4161 road) and the Eastern Avenue (A48 road) in 1978 and the last section of the PDR, the first phase of the Eastern Bay Link Road, which was opened to the public in June 2017.[1][2]
The former chairman of the South Glamorgan County Council environment committee, Councillor Paddy Kitson, called the road a "necklace of opportunity" due to its shape and also the opportunities for regeneration.[1] By 1 April 1996 the responsibility for the road was transferred from South Glamorgan County Council to the unitary authority of Cardiff Council. Much of the funding for the road had been grant aided from the European Community and the UK Government on the basis that it would improve the economic viability of the area and bring in new jobs and industry.[1] However, since the completion of the Butetown Link Road, funding for further developments have been at a standstill,[2] and to date 22 kilometres (14mi) including spurs are open to traffic with plans for a further 5.53km (3.44mi).[6] The "missing link", the second and final phase of the Eastern Bay Link Road, is still to be built.[2]
Route description
The PDR has 3 separate sections: the Capel Llanilltern Interchange (M4 J33) to the Ocean Way roundabout, the Lamby Way roundabout to the Llanedeyrn Interchange (A48) and the Pontprennau Interchange (A48) to the Pentwyn Interchange (M4 J30).
The section from the Capel Llanilltern Interchange on the M4 (junction 33) to the Ocean Way roundabout is sometimes referred to as the Western Link Road (Welsh: Ffordd Gyswllt Gorllewin),[8] is 15.77 kilometres (9.80mi) in length and includes the Capel Llanilltern – Culverhouse Cross Link Road, Ely Link Road, Grangetown Link Road and Butetown Link Road. For the majority of this section it is the boundary between the City of Cardiff to the east and the Vale of Glamorgan to the west.
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This section partly opened in 1978,[1] from the Lamby Way roundabout to the Llanedeyrn Interchange on the A48, is the oldest section of the PDR. It includes only the Southern Way Link Road, known locally as Southern Way, and is 2.25km (1.40mi) in length.
The Pentwyn Link Road section from the Pontprennau Interchange on the A48 to the Pentwyn Interchange on the M4 (junction 30) is one of the newer sections of the PDR, having been opened in 1984; it is 1.61km (1.00mi) in length. The road between the Llanedeyrn Interchange to the Pontprennau Interchange is the A48 (Eastern Avenue); it too is a dual carriageway and is a concurrent road with the PDR; there are no plans to renumber this section of the A48.
The viaduct is a 538ft (164m) twin-box girder and has central span of 230ft (70m) and 150ft (46m) side spans, constructed by the balanced cantilever method. It was constructed in segments, each weighing between 54 tons for plain segments and 93 tons for the main segments.[12]
Ely Link Road
Footbridge on the Ely Link Road, connecting Mary Immaculate High School to Caerau
The Grangetown Viaduct (Welsh: Traphont Trelluest) is approximately 1km (0.62mi) in length and is said to be the longest glued segmental bridge in the United Kingdom.[15] It has 13 spans of 71 meters (233ft) with 2 end spans of 38m (125ft) and 46m (151ft).[16]
The viaduct was designed by South Glamorgan County Council. Robert Benaim and Associates, now called Benaim UK Ltd designed the initial launching system for the glued segmental structure.
Butetown Link Road
Butetown Link Road's Taff Viaduct, crossing the River Taff before entering the Queen's Gate Tunnel to the left
In 1987 South Glamorgan County Council had intended to build a viaduct cross the River Taff and then go onto an elevated section through Butetown "on stilts".[7] But the newly formed Cardiff Bay Development Corporation along with local residents objected to the scheme that they said would cut through Butetown and split the community, creating an unnecessary physical barrier between the two areas to the north and south of the link road. By 1988 South Glamorgan County Council had agreed to change the design of the link road, despite having already spent 6years of design work on the link road meant that a tunnel had to be built instead.[17] The cost of the Butetown Link Road was estimated to cost £35million, but this had risen to £45M in 1988, before the design change.[18]
The contract to build the Butetown Link Road was eventually won by a local company Davies Middleton & Davies Ltd in a joint venture with an Italian contractor, Cogefar-Impressit UK Ltd. The bid of £60million undercut all other bids by £10million,[19] Davies Middleton & Davies Ltd subsequently went into administrative receivership.
Queen's Gate Tunnel
Queen's Gate Tunnel
During construction in the "cover" phase of the "cut and cover" method of construction
The western entrance and exit of the tunnel
The Queen's Gate Tunnel (Welsh: Twnnel Porth y Frenhines), also known as the Butetown Tunnel, is underneath southern Butetown and follows a line underneath the Wales Millennium Centre. The 715m (2,346ft)[20] twin tunnel was constructed using the cut and cover method of construction, which involves digging a trench for the tunnel and then roofing it over. The tunnel was constructed using reinforced concrete and a central wall separates the two sets of traffic.[21]
South Glamorgan County Council originally awarded the contract for the management, installation, testing and commissioning of all electrical and mechanical services for the tunnel, and the water pumping stations to EI·WHS Ltd. They still maintain the tunnel on behalf of Cardiff Council.[20]
Immediately to the east of the tunnels is an unfinished viaduct which had been built to continue over Queen's Gate Roundabout to link up with the next section. The viaduct will not be completed during the 2016-2017 construction of the Eastern Bay Link road, but remains available for future development.
Taff Viaduct
Taff Viaduct
During construction
Spanning the River Taff
Construction of the 600m (2,000ft) Taff Viaduct (Welsh: Traphont Tâf) includes a dual-carriageway roadway plus a foot and cycle path. South Glamorgan County Council was the local authority in charge of the project at the time and construction of the viaduct began in March1991. The Taff Viaduct crosses the River Taff at Cardiff Bay and is known locally as Pollinger Bridge.
The viaduct was constructed using precast concrete segments, which is widely used in the construction industry for medium to long span viaducts. Segments were made in a casting yard near the site and then transported for final assembly of the viaduct.[22]
Eastern Bay Link Road
Eastern Bay Link Road
Construction on the first phase of the 5.25km (3.26mi) Eastern Bay Link Road (Welsh: Ffordd Gyswllt Dwyrain y Bae), also known as the Ewart Parkinson Road (Welsh: Ffordd Ewart Parkinson), began on 17 March 2016.[23] It runs from the Queen's Gate Roundabout to the Ocean Way roundabout and was opened on 15 June 2017 by the First Minister of WalesCarwyn Jones.[24] Only phase 1 of the 1.2km (0.75mi) road between Queen's Gate Roundabout (51°28′05″N3°09′22″W / 51.468090°N 3.156193°W / 51.468090; -3.156193 (Queen's Gate Roundabout)) and Ocean Way Interchange (51°28′20″N3°08′39″W / 51.472328°N 3.144107°W / 51.472328; -3.144107 (Ocean Way Interchange)) has been constructed, with a feasibility study being carried out into the final phase (Phase 2) of the link road between Ocean Way roundabout to the A48 Eastern Avenue.[25][26] The link road is a two lane dual carriageway with a 50 miles per hour (80km/h) speed limit eastbound and a 40 miles per hour (64km/h) speed limit westbound.[27][28] Originally the link road was to have just a 180m (590ft) with embankments at both ends of the link road, however because a sewer could not be diverted, a 670m (2,200ft) viaduct had to be built instead, which caused delays to the construction.[29] The viaduct was constructed using steel and concrete and consists of 21 spans with 120 precast concrete beams and 220m (720ft) of steelwork.[30][31]
Phase 1 of the Eastern Bay Link Road
The route of Phase 1 of the Eastern Bay Link Road. The western end (left) is Queen's Gate roundabout, the eastern end is (right) is Ocean Way roundabout
For many years this link road had been mothballed due to the costs involved.[32] The link road had previously been known as the East Moors Link Road – Phase 1 and 3, but it also included the East Moors Viaduct, which was originally known as the East Moors Link Road – Phase 2.[1] Later it became known as the Cardiff Bay Link Road, then renamed again becoming the Eastern Bay Link Road.[7]
The Eastern Bay Link Road was subject to many planning proposals since the last link road (the Butetown Link Road) was completed in 1995, namely a local transport plan (Local Transport Plan 2000–2016) in August 2000, a green paper (A Change of Gear) in December 2002 and a white paper (Keeping Cardiff Moving) in May 2003.[6][33] The cost of the link road was estimated to cost £162million in 2001 and this increased to £180million by August 2002. It was suggested that it could be paid for by congestion charging,[34] although a public-private partnership was also considered.[35]
The new route would be different from the earlier proposal and would avoid any encroachment into the nature conservation area, which Friends of the Earth and the RSPB had objected to. The new route would ensure that there would be no objections.[38][39]
It was revealed on 14 June 2013 that Edwina Hart, Minister for Economy, Science and Transport in the Welsh Government supported the completion the Eastern Bay Link Road.[40] She said that the link road would; improve access to Cardiff Bay, improve access to the Cardiff Central Enterprise Zone and enhance connections within the Cardiff City Region.[41] The overall objectives of the road would be to:
Increase accessibility from east Cardiff to major employment sites in the East Moors area, Cardiff Bay and the Central Cardiff Enterprise Zone
Provide a more direct route between the Butetown Tunnel and Rover Way
Reduce congestion at the junctions on Tyndall Street by removing traffic currently using the Ocean Way- East Tyndall Street – Central Link route
Reduce journey times for private and commercial road users
Help economic regeneration
Enhance road safety and reduce casualties
Improve resilience on the strategic road network around Cardiff
Provide more opportunities for cycling and walking[41]
Phase 1 (Ewart Parkinson Road)
Construction of phase 1 of the Eastern Bay Link Road
During construction looking west towards Queens Gate roundabout (October 2016)
Drone footage of the Eastern Bay Link in 2017
On 2 May 2014, Edwina Hart approved the procurement of the design–build contractor, advance service diversion works and communications arrangements for the Eastern Bay Link Road.[42] In April 2015, it was announced by the Welsh Government that the 1.2km (0.75mi) £27.3m Eastern Bay Link Road from the Queens Gate roundabout to the Ocean Way roundabout at Tremorfa known as the "roundabout to nowhere", would be designed by Capita Property and Infrastructure with Cass Hayward being the specialist bridge designer.[30] It was constructed by Dawnus and Ferrovial Agroman UK in a joint venture.[28][43] Construction began on Phase 1 of the link road on 17 March 2016,[26][28] This phase of the road was opened on Thursday 15 June 2017 by the First Minister of WalesCarwyn Jones.[24]
Phase 2
It was reported on 9 December 2016 by Cardiff Council that a feasibility study into Phase 2 between the Ocean Way roundabout to the A48 Eastern Avenue would take place and would be funded by the Welsh Government, as will all the construction costs for Phase 2.[25] Extending the link road 5km (3.1mi) from Ocean Way roundabout to the A48 (via the Southern Way Link Road) could take between three and five years to complete.[44]
On 21 October 2021, Huw Thomas, leader of Cardiff Council said:
Only a kilometre of new road has been built in Cardiff since devolution. I think there is a compelling case to be made in particular around the Eastern Bay Link, completing from the Queensgate roundabout eastwards to the end of Rover Way to be upgraded. That's really important not just as a gateway to the city and Cardiff Bay, but as a way of diverting traffic away from residential areas including my own ward of Splott. On the Eastern Bay Link, conversations at an official level have been happening for some years now with a decent amount of detail. I will certainly be making representations, when I next meet the climate change minister and the deputy minister for transport, of the importance of that road.[45]
From in October 2021 Arcadis conducted a WelTAG (Welsh Transport Planning Appraisal Guidance) Stage 1 study.[46] The WelTAG study found that it would involve:
Realignment of Rover Way between the A4232 Southern Way Roundabout and the Ocean Way / A4232 Eastern Bay Link Roundabout to accommodate extension of existing development;
Modification of five junctions along Rover Way to prioritise strategic east-west movements: Ffordd Pengam (access to a Tesco store); Seawall Road; Tide Fields Road (access to Cardiff East waste treatment works); Darby Road (access to Tremorfa Industrial Estate); and Ocean Way (access to Cardiff Docks);
Provision of an active travel route and crossing facilities.[47]
On 14 February 2023, following a review of all new road building by the independent Roads Review Panel, the Welsh Government classified the link road as a 'local authority scheme' and would be considered for grant funding in the future if it met the Welsh Government's criteria,[48] that being:
To support a modal shift (from one form of transportation to another) and reduce carbon emissions.
To improve safety through small-scale changes.
To adapt to the impacts of climate change.
To provide access and connectivity to jobs and centres of economic activity in a way that supports modal shift.[49]
Southern Way Link Road
East Moors Viaduct Southern Way Flyover
The Southern Way Link Road (Welsh: Ffordd Gyswllt y Ffordd Deheuol),[50] generally known simply as Southern Way, was built in two parts; the first section of Southern Way to be completed was between Newport Road (A4161 road) and the Eastern Avenue (A48 road) in 1978.[1] The final section of the link road was built between Newport Road and the Rover Way – Lamby Way roundabout and was opened in 1984 at a cost of £9million and includes the East Moors Viaduct, which is also known as the Southern Way Flyover.[1] In 1987 it was envisaged that the present single-carriage would be "twinned" as a dual-carriageway, the same as the rest of the PDR.[7] The 2.25km (1.40mi) link road now runs from the Rover Way – Lamby Way Roundabout (51°29′35″N3°08′02″W / 51.493127°N 3.133759°W / 51.493127; -3.133759 (Rover Way – Lamby Way Roundabout)) to the Llanedeyrn Interchange (51°30′26″N3°08′45″W / 51.507202°N 3.145853°W / 51.507202; -3.145853 (Llanedeyrn Interchange)) on the A48.
East Moors Viaduct
The 900m (3,000ft) East Moors Viaduct (Welsh: Traphont Rhostiroedd y Dwyrain),[51] which is also known as the Southern Way Flyover, was also designed by Robert Benaim and Associates who won the ICE (Institution of Civil Engineers) Project Award and also a Concrete Society Commendation, both in 1985 for work on the viaduct.[52][53] The viaduct was constructed by concrete box girder deck of segmental construction.[52] The East Moors Viaduct was originally known as the East Moors Link Road – Phase 2,[1] but now forms part of the Southern Way Link Road.
Pentwyn Link Road
Looking north approaching the Pontprennau roundabout
South Glamorgan County Council commissioned a sculpture by Kevin Atherton for the foot and cycle path on a specially constructed viewing platform. The work was to mark the completion of the Taff Viaduct so that the sculpture should be visible for the benefit of pedestrians, cyclist and motorists alike.[55] It was unveiled in 1995.[56]
Commemorative stone
Butetown Link Road / Eastern Bay Link Road (Phase 1)
Queen's Gate Roundabout
Stone marking the inauguration of Queen's Gate (Butetown Link Road) at the Queen's Gate roundabout on 15 October 1993.
Sculpture - Secret Station
Southern Way Link Road
Rover Way roundabout (south west of roundabout)
A sculpture by Eilis O'Connell, unveiled 1992.[56] It was vandalised in early 2018 and remains in its bare state, with the mechanics of the light and smoke machine visible.
Commemorative stone
Pentwyn Link Road
Heol Pontprennau roundabout (south west of roundabout)
Stone marking the opening of the Pentwyn Link Road on 20 June 1994.
The most recent development, which began at the end of 2006 and into 2007 was the widening of the road between the Cogan Viaduct and the Ferry Road Interchange to a 3-lane dual-carriageway. A new junction was also built for the Cardiff International Sports Village directly from Cogan Spur; also the Barons Court roundabout was replaced by a signal controlled crossroad. The main contractor for this project was Laing O'Rourke Civil Engineering.[57][58]
Cogan Viaduct
The Cogan Viaduct (Welsh: Traphont Cogan) is the most important element of the Cogan Spur as it crosses the River Ely with a central span of 95metres (312ft). In total it has 6 spans; 40m (130ft), 60m (200ft), 60 m, 60m, 95 m and 60 m.[16] It is made from a multi-span glued segmental structure of rectangular box sections. In all over 300 sections were used to construct the viaduct, each weighing from 43 tonnes (43,000kg) to 117 tonnes (117,000kg).[22][59] The Cogan Viaduct was again designed by South Glamorgan County Council, who won a Concrete Society Commendation in 1989 for the design.
Central Link Road (A4234)
Central Link Road The Splott Junction road looking north
The £8.5million Central Link (Welsh: Ffordd Gyswllt Canolog) between the Queen's Gate Roundabout (51°28′06″N3°09′27″W / 51.468399°N 3.157366°W / 51.468399; -3.157366 (Queen's Gate Roundabout)) and the junction on Adam Street (51°28′46″N3°10′03″W / 51.479557°N 3.167631°W / 51.479557; -3.167631 (Adam Street Junction)) on the A4160 was opened on 16 February1989.[1][14] When it was first opened it only linked Cardiff city centre with Cardiff Bay. It was not until the Butetown Link was opened on 27 March1995 that this road started to be used as a link to the motorway network, Penarth and the Vale of Glamorgan. It will not be until the Eastern Bay Link is built, when traffic from the city centre will use it to travel east, that it will be fully used. The length of the A4234 is just 1.45km (0.90mi) and is entirely a two lane dual carriageway with clearway restrictions.
Abandoned spur roads
Ely Spur
Ely Bridge Roundabout
The Ely Spur was planned to run from a new interchange on the Ely Link Road to the Ely Bridge Roundabout on the A48. It was only 1.2km (0.75mi) in length, but it would have reduced through traffic in the residential area of Ely, namely on Cowbridge Road West traveling to and from the A48. But it has now been announced that this proposal has now been officially abandoned.[38]
Cardiff Airport Link Road
The A4050 road
The Cardiff Airport Link Road (Welsh: Ffordd Gyswllt Maes Awyr Caerdydd) was a proposed spur road off of the A4232 through to Cardiff Airport, when plans for the road were scrapped by the WAG in June 2009.[60] The single carriageway A4050 road, from Cardiff to Cardiff Airport is currently the main road from Barry to Cardiff and is the main commuter route. There were 4 proposed schemes linking the Ely Link Road, south of the Culverhouse Cross Interchange, through to the A4226 north of Barry. The estimated cost of this scheme would have been £96m, including the widening of the A4232.[61]
Traffic Wales is the Welsh Government's traffic information service, it is a partnership between the Welsh Government, the two Trunk Road Agents (South Wales TRA / North & Mid Wales TRA) and the WTTC consultancy Amey. In South Wales the service is managed from the South Wales Traffic Management Centre, also home to INRIX Media's studio, providing live travel information for the media. The Traffic Wales website has five live traffic webcams on the Capel Llanilltern – Culverhouse Cross Link Road (Trunk Road) and the images are updated every 5 minutes. Traffic Wales also operates a Traffic Information Hotline, motorists can use this telephone service by dialling an 0845 number, which gives up to date traffic information and travel advice.
Traffic congestion
Since the western link roads were built, a number of major developments have been built, such as the Cardiff Bay Retail Park, IKEA, Celtic Gateway, Cardiff International Sports Village that includes the Cardiff International Pool, Cardiff International White Water and Cardiff Arena, which have all generated additional traffic at the Ferry Road Interchange. In addition, the Leckwith development, which includes Cardiff City Stadium, Cardiff International Sports Stadium and the Capital Retail Park with a new Asda supermarket, have also significantly increased traffic on the Leckwith Interchange.[8] At the Culverhouse Cross Interchange, older developments such as the Brooklands Retail Park, Wenvoe Retail Park and Valegate Retail Park, including Tesco and Marks & Spencer have also significantly increased congestion along with commuter traffic from the Vale of Glamorgan. From 1989 to 1997 there had been an increase in traffic of 78% and a further increase of 35% by 2016 is predicted by the Assembly.[61] The Vale of Glamorgan Council also expressed reservations about the new developments of the Cardiff International Sports Village and the Cardiff City Stadium, which includes the Capital Retail Park. On 18 October2006, the council requested that the WAG assess the existing traffic conditions and future growth in traffic on the network.[64]
Popular culture
The Queen's Gate Tunnel was featured in the first ever episode of Torchwood. The Grangetown Link featured in the 2006 Christmas episode of Doctor Who. The Tunnel again featured in Doctor Who in 2009. Serving as a stand in for the Dartford tunnel
The Vale of Glamorgan, locally referred to as The Vale, is a county borough in the south-east of Wales. It borders Bridgend County Borough to the west, Cardiff to the east, Rhondda Cynon Taf to the north, and the Bristol Channel to the south. With an economy based largely on agriculture and chemicals, it is the southernmost unitary authority in Wales. Attractions include Barry Island Pleasure Park, the Barry Tourist Railway, Medieval wall paintings in St Cadoc's Church, Llancarfan, Porthkerry Park, St Donat's Castle, Cosmeston Lakes Country Park and Cosmeston Medieval Village. The largest town is Barry. Other towns include Penarth, Llantwit Major, and Cowbridge. There are many villages in the county borough.
The M4, originally the London-South Wales Motorway, is a motorway in the United Kingdom running from west London to southwest Wales. The English section to the Severn Bridge was constructed between 1961 and 1971; the Welsh element was largely complete by 1980, though a non-motorway section around Briton Ferry bridge remained until 1993. On the opening of the Second Severn Crossing in 1996, the M4 was rerouted over it.
The A470 is a trunk road in Wales. It is the country's longest road at 186 miles (299 km) and links the capital Cardiff on the south coast to Llandudno on the north coast. While previously one had to navigate the narrow roads of Llanidloes and Dolgellau, both these market towns are now bypassed due to extensive road modernisation. The 26 miles (42 km) from Cardiff Bay to Merthyr Tydfil are mainly dual carriageway, but most of the route from north of Merthyr to Llandudno is single carriageway.
The A48 is a trunk road in Great Britain running from the A40 at Highnam, 3 miles (4.8 km) west of Gloucester, England, to the A40 at Carmarthen, Wales. Before the Severn Bridge opened on 8 September 1966, it was a major route between England and South Wales. For most of its route, it runs almost parallel to the M4 motorway. During times of high winds at the Severn Bridge, the A48 is used as part of the diversion route and is still marked as a Holiday Route.
Butetown is a district and community in the south of the city of Cardiff, the capital of Wales. It was originally a model housing estate built in the early 19th century by the 2nd Marquess of Bute, for whose title the area was named.
Cardiff Airport is an airport in Rhoose, Wales. It is the only airport offering commercial passenger services in Wales. The airport is owned by the Welsh Government, operating it at arm's length as a commercial business.
Culverhouse Cross is a district straddling the boundary between Cardiff and the Vale of Glamorgan, Wales, in the community of Wenvoe.
Cowbridge Road West is a major road in western Cardiff, the capital of Wales and forms part of the A48 road.
Transport in Cardiff, capital and most populous city in Wales involves road, rail, bus, water and air. It is a major city of the United Kingdom and a centre of employment, government, retail, business, culture, media, sport and higher education.
The A4119 links Tonypandy with Cardiff in South Wales.
The A4055 is the main road link between Cardiff Bay and Barry.
The A4050 road connects Barry, Vale of Glamorgan with Culverhouse Cross on the outskirts of Cardiff, Wales. It is approximately 10 miles (16 km) long, and is the key link road between the M4 motorway and Cardiff International Airport.
The A4161 is a main road in Cardiff, Wales, United Kingdom. The main purpose of the road is to link the city centre with the M4 motorway in the west at junction 33, and in the east with the A48(M) motorway at St Mellons.
The A4241 Port Talbot Peripheral Distributor Road is a distributor road serving Port Talbot, Wales.
Trunk roads in Wales were created in the Trunk Roads Act of 1936 when the UK Ministry of Transport took direct control over 30 of the principal roads in Great Britain from English, Welsh and Scottish local authorities. The number of trunk roads was increased from 30 to 101 in the Trunk Roads Act of 1946. These roads formed what the Act called "the national system of routes for through traffic". Since Welsh devolution the trunk road system in Wales has been managed by the South Wales Trunk Road Agent and the North and Mid Wales Trunk Road Agent on behalf of the Welsh Government. As of April 2019, out of a total of 34,850 miles (56,090 km) of roads in Wales, 1,576 miles (2,536 km) are trunk roads.
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M4 (J33)
A4050 
A4055 
A4234 
A4161 
