The B1508 is a largely rural B-road along the Essex/Suffolk border. The road was originally numbered A133 but was downgraded in the 1970s as it largely shadowed the route of the A134.
The road starts on the northern side of town near the station at a large hamburger-type roundabout on the A134. It heads northwest through the suburbs and soon goes over the A12 bypass on what appears to be an over-engineered bridge; there is no junction here. The village of West Bergholt starts almost immediately and we run through the centre before reaching open country proper for the first time.
A mile or so further on we bend sharply right then left again to pass through Wormingford and then descends into the valley of the River Stour. It follows the river upstream into Bures where it bears right to pass the village green and cross the river before following a winding route through the village centre and leaves heading north, still following the river valley upstream. However, as the river's course is winding and marshy the road does not follow it exactly but climbs out of the valley bottom to run along the top.
Presently the road reaches Sudbury. It enters town from the south along Bures Road, running parallel to the railway line which is barely visible. In the town centre the road on the A131/A134 one-way system at a roundabout very reminiscent of the one the road started on, albeit much smaller.