A week at work spent surveying a quarry at Buckfastleigh in November 1963 gave an opportunity to explore part of the Ashburton Branch between its closure by BR and its takeover by the Dart Valley Railway. I was able to walk the section of line now occupied by the new dual-carriageway A38 Road.from Ashburton to Buckfastleigh.

Ashburton Station with its timber trainshed and stone goods shed. The station building and train shed are a listed structure and now used as a garage, but the platform has been removed. The goods shed also still survives.
The bridge under the old A38 road outside Ashburton, view towards Ashburton. The unusual shape of the entrance retaining wall is due to the railway passing under the road embankment at an acute angle and it was more of a short tunnel than an overbridge.

A rather poor quality shot near Buckfastleigh, but included because it shows the bridge over the River Dart. Taken from a road overbridge with Buckfastleigh Station in the left distance. The track on the bridge and in the foreground appears to be freshly ballasted !.

A view today from a similar (or as near as I could get it) position as the previous photo on Google Maps. The River Dart is hidden by the trees on the right and passes under the road approximately where the van is.
Buckfastleigh Station, view towards Totnes
A last special train ran to Ashburton on 2nd October 1971, after which the line was severed beyond Buckfastleigh Station.