A4109 road

The A4109 road, known as the Inter-Valley Road, links Aberdulais with Glynneath in Neath Port Talbot county borough, Wales.

A4109
Major junctions
Southwest end	Aberdulais
Major intersections	A465 A4230 A4221 A465
Northeast end	Glynneath
Location
Country	United Kingdom
Constituent country	Wales
Road network
Roads in the United Kingdom Motorways A and B road zones

The route begins in Aberdulais at the junction with the A4230 and A465 roads; it diverges northwards away from the A465 up the Dulais Valley and crosses through the settlements of Crynant, Ynysfforch, Seven Sisters, Onllwyn, Dyffryn Cellwen and Banwen 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 road is noteworthy for the amount of roadkill to be found on the road.

51°44′49″N 3°44′17″W / 51.74688°N 3.73801°W / 51.74688; -3.73801