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.

A4161 shield
A4161 Cardiff.jpg
Newport Road, with the A4232 Southern Way flyover in the background
Major junctions
East endA4232 (Southern Way)
51°30′01″N 3°08′25″W / 51.5002°N 3.1402°W / 51.5002; -3.1402 (A4161 road (eastern end))
Major intersections A4232
West endA48 (Ely Bridge)
51°29′06″N 3°13′43″W / 51.4851°N 3.2286°W / 51.4851; -3.2286 (A4161 road (western end))
CountryUnited Kingdom
Constituent countryWales
Road network
A4160 A4162


The 1923 route of the A48 was the main east–west link in south Wales. The A48 in Cardiff was re-numbered to the A4161 on 19 November 1971 when the Eastern Avenue dual carriageway became the A48.[1] By 2 November 1975, Queen Street was partly pedestrianised and 2 subways were opened under North Road and Boulevard de Nantes[1] to allow the A4161 then to move from Queen Street to Dumfries Place, Stuttgart Strasse, Boulevard De Nantes. The A48 section between Rumney and St Mellons later became the B4487 and Southern Way (A4232) was built in 1978.[2]

Old A48 routeEdit

Cardiff Bridge
Junction of Newport Road (A4161) and West Grove
Cardiff in 1946

From east to west:

Current routeEdit

From east to west it runs through the following roads in Cardiff:

  • From Southern Way west along Newport Road
  • Dumfries Place
  • Stuttgarter Strasse
  • Boulevard De Nantes

The road then follows the A470 from North Road (alongside Cardiff Castle through to Duke Street, before becoming the A4161 again from:

  • Castle Street, and over Cardiff Bridge
  • Cowbridge Road East
  • Wellington Street
  • Atlas Road
  • Lansdowne Road
  • Cowbridge Road East again, ending at Ely Bridge (roundabout on the A48)

Types of roadEdit

From To Type of road
Southern Way Albany Road 3 lane (both ways) dual carriageway
Albany Road Broadway 2 lane single carriageway
Broadway North Road 2 lane (both ways) dual carriageway
North Road and Duke Street (A470)
High Street Cathedral Road 2 lane (both ways) dual carriageway
Cathedral Road Ely Bridge 2 lane single carriageway


  • Cardiff & Newport A-Z Street Atlas 2007 Edition


  1. ^ a b "Cardiff Timeline". Cardiff Council. Archived from the original on 29 September 2007. Retrieved 3 October 2007.
  2. ^ South Wales Echo, "Opening up southern Cardiff – Value of PDR", Wednesday 22 May, 1985, Page 15
Map all coordinates using: OpenStreetMap 
Download coordinates as: KML

Coordinates: 51°29′03″N 3°10′37″W / 51.4842°N 3.1769°W / 51.4842; -3.1769 (A4161 road)