The A4109 road, known as the Inter-Valley Road, links
Aberdulais
Aberdulais is a village and electoral ward in Neath Port Talbot, Wales, lying on the River Neath, in the community (Wales), community of Blaenhonddan. The village grew around the Aberdulais Falls, the site of successive industries and now a hydr ...
with
Glynneath in
Neath Port Talbot county borough,
Wales.
The route begins in
Aberdulais
Aberdulais is a village and electoral ward in Neath Port Talbot, Wales, lying on the River Neath, in the community (Wales), community of Blaenhonddan. The village grew around the Aberdulais Falls, the site of successive industries and now a hydr ...
at the junction with the
A4230 and
A465 road
The A465 is a trunk road that runs from Bromyard in Herefordshire, England to Llandarcy near Swansea in South Wales. The western half is known officially as the Neath to Abergavenny Trunk Road, but the section from Abergavenny to the Vale of Nea ...
s; it diverges northwards away from the A465 up the
Dulais Valley and crosses through the settlements of
Crynant
Crynant ( cy, Y Creunant) is a village and community in the Dulais Valley in Wales. It lies 7¾ miles north-east from the town of Neath in Neath Port Talbot, situated between the mountains of Mynydd Marchywel to the west, Hirfynydd to the east a ...
,
Ynysfforch
Seven Sisters ( cy, Blaendulais: source of the (river) Dulais) is a village and community in the Dulais Valley, Wales, UK. It lies north-east of Neath. Seven Sisters falls within the Seven Sisters ward of Neath Port Talbot county borough.
H ...
,
Seven Sisters,
Onllwyn
Onllwyn () is a small village and community in Neath Port Talbot, Wales, near Seven Sisters.
History
First developed by the Romans, the local village Banwen is confined to the Roman Road of Sarn Helen. There are two Roman forts and the remai ...
,
Dyffryn Cellwen
Dyffryn Cellwen is a village in the County Borough of Neath Port Talbot, South Wales. It is situated in the upper Dulais Valley near the junction of the A4109 and A4221 roads, northwest of the smaller settlement of Banwen. It is part of the comm ...
and
Banwen
Banwen is a small village in Neath Port Talbot county borough in Wales. Banwen is part of the community of Onllwyn along with the village of Onllwyn itself and the adjacent parish of Dyffryn Cellwen. Banwen is in the Upper Dulais Valley, with vi ...
where it has a junction with the
A4221. The road then continues in a southeasterly direction along the Inter Valley Road to Glynneath where it again connects with the
A465
The A465 is a trunk road that runs from Bromyard in Herefordshire, England to Llandarcy near Swansea in South Wales. The western half is known officially as the Neath to Abergavenny Trunk Road, but the section from Abergavenny to the Vale of N ...
.
The road is noteworthy for the amount of
roadkill
Roadkill is an animal or animals that have been struck and killed by drivers of motor vehicles on highways. Wildlife-vehicle collisions (WVC) have increasingly been the topic of academic research to understand the causes, and how it can be mi ...
to be found on the road.
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Roads in Wales
Transport in Neath Port Talbot
Dulais Valley