Gabalfa Interchange

From Roader's Digest: The SABRE Wiki
Jump to: navigation, search
Gabalfa Interchange
Location Map ( geo)
Subway under Gabalfa Interchange, Cardiff - Geograph - 2759060.jpg
Subway under the Gabalfa Interchange
Cameraicon.png View gallery (5)
Highway Authority
Welsh Government
Junction Type
Three-Level Stacked Roundabout
Roads Joined
A48, A469, A470
Junctions related to the A48
Balfe Road Roundabout • Beatty Road Roundabout • Church Street Roundabout (Newport) • Coedkernew Junction • Coldra Interchange • Cross Hands Roundabout • Culverhouse Cross roundabout • Earlswood Interchange • Fairoak Interchange • Groes Interchange • Hartridge Farm Road Roundabout • Highbeech Roundabout • Highnam Roundabout • Llangyfelach Interchange • Lon-Las Interchange • Maesglas East • Maesglas West • Margam Interchange • Mynachdy Interchange • Nash Road Roundabout • Parkwall Roundabout • Penllergaer Interchange • Pensarn Roundabout • Pentyla Interchange • Pont Abraham Interchange • Pont Ebbw Roundabout • Queensway Meadows Roundabout • St Mellons Junction • Sycamore Cross • Tredegar Park Interchange • Waterton Cross
Junctions related to the A470
Abercanaid Roundabout • Abercynon Roundabout • Bala Junction • Bridge Street Interchange • Broadway Interchange • Brynich roundabout • Cefn Coed Roundabout • Cemmaes Road Roundabout • Coryton Interchange • Cross Foxes • Gellideg roundabout • Glan Conwy Interchange • Glyntaff Interchange • Llangurig roundabout • Llanidloes roundabout • Llyswen junction • Mallwyd • Moat Lane Junction • Nantgarw Interchange • Rhyd-y-car roundabout • Taffs Well Interchange • Tarell roundabout • The Flourish • Upper Boat Interchange

Gabalfa Interchange is a major three level junction located in the northern suburbs of Cardiff. It appears that the name of the junction comes from the area it is situated within, which originally comes from Gabalva House that was situated on the site of the present day estate (source: A Vision of Britain through Time)


Original plan for the junction along with an improved A470
Bigger things were planned for the junction when originally designed. In 1966 Buchanan published a transportation report into future road proposals for the city. This would see two important roads cross at Gabalfa, an improved A470 and a new inner bypass which was opened as Eastern Avenue. A three level interchange was planned to connect these roads. The original plan was to grade separate the A470 north of Gabalfa which would have meant the loss of houses on the eastern side of the road. South of Gabalfa the flyover was to curve eastwards onto a new dual carriageway to the city centre.

In 1968 the A470 plans were shelved, possibly due to the heavy loss of property, and a slight alteration was made to the planned junction. The flyover was retained but would now tie into the existing road network. At its northern end a one way system was created and the southern end was built straighter which descends onto North Road. The roundabout was now to have an extra arm serving the A469 which originally was to be replaced by the link to the city centre. Eastern Avenue was built as planned and this took the A48 number.

The junction as built (top) with the unbuilt Llantrisant Radial
Another element of the junction was the Llantrisant Radial. This would have joined the A48 to the west. The close proximity of the junctions meant C/D lanes were planned to reduce weaving. Gabalfa Interchange was built before the Llantrisant Radial and to help reduce later costs the west facing slips were built on a splay. This is so the retaining walls would not have to be replaced at great cost when the Llantrisant Radial was built. The Llantrisant Radial was later scrapped so the splay was not needed but the extra long slip roads can still be seen as a legacy of greater plans the never saw the light of day.


Route To Notes


M4 (E), Newport, University Hospital


Cardiff (W), Cardiff Airport


M4 (W)


Roath A469 number is not signed

Gabalfa Interchange
Related Pictures
View gallery (5)
A470 Northern Avenue upgrade.pngMynachdy Interchange Buchanan Route.pngMynachdy Interchange River Route.pngPublic art on Eastern Avenue, Cardiff - Geograph - 1990643.jpgSubway under Gabalfa Interchange, Cardiff - Geograph - 2759060.jpg
Other nearby junctions
CardiffAdamsdown Interchange • Albany Road Interchange • Butetown Interchange • Cardiff West Interchange • Coryton Interchange • Culverhouse Cross roundabout • Fairoak Interchange • Grangetown Interchange • Heathwood Road Interchange • Llanishen Interchange • M4 J31 • Mynachdy Interchange • Newport Road Interchange • Pentwyn Interchange • Radyr Interchange • Splott Interchange • St Mellons Junction • The Flourish • The Magic Roundabout (Cardiff) • Ty Glas Interchange