From Roader's Digest: The SABRE Wiki
|Length:||16.6 miles (26.7 km)|
|Meets:||A40, B4224, A4151, B4234, B4028, B4432, B4428, A466|
|Route outline (key)|
The A4136 runs across the north of the Forest of Dean. Originally the B4223, it gained its current number around 1930.
The road starts at traffic lights on the A40 at Huntley, a few miles to the west of Gloucester. The majority of the A4136 is very winding and we find this out from the beginning, as the road zigzags around Broomhill Wood and eventually starts heading westwards. There is then a climb into the high land of the Forest of Dean. We bypass Longhope and then descend again to reach Mitcheldean. On the near side of town there's a brief dual section on one of the sharp corners to aid access to a business park. The road then skirts the southern edge of the town, meeting the B4224 at a mini-roundabout.
On reentering open country the road climbs Plump Hill, with good views over the valley to the left. There is then a sharp bend to the right around a spur and soon the road becomes wooded, which lasts for about half a mile to the next village, Drybrook. Again the road only skirts the edge of the settlement. At traffic lights we meet a road from the village, with the A4151 turning left opposite. That road is one-way, however; we meet the inbound A4151 (also one-way) at the next set of lights.
The road now reenters the wood and stays there for some distance along what is, for the A4136, a remarkably straight road. The B4234 crosses us, after which we climb Worrall Hill and the road becomes more winding again. At Edge End the B4028 bears off left, then we reach the village of Five Acres and, at traffic lights, the B4432 - turn right for Symonds Yat. We cross a few fields before returning to the trees and an unexpected set of traffic lights where the B4228 comes in at a sharp angle from the left.
After winding through the village of Staunton we cross the border into Wales. It then takes an exceptionally circuitous route around The Kymin, with one of the sharpest bends called the Fiddler's Elbow. The wood is finally left behind after which the road straightens out for the last descent into Monmouth. There's one final bend to the right and a mini-roundabout before we pass Lidl and end at another mini-roundabout on the A466 just to the east of its bridge over the River Wye.