This is two unconnected driveways (not a road) and doesn't connect Ash Mill Road to Holicong Road. From either end there are two long driveways, but they don't connect at all.

The southern part (from Holicong Road, partially correctly shown on OSM) has three houses on it: one in a loop and two in terminal lines. The northern part (from Ash Mill Road) serves one house and ends approximately where the line curves south.

This error has been present for years and has even made it on to Google Maps... even though you can see on GM satellite that there's no path connecting these two driveways. I lived in this area for decades and even knew someone who lived in one of these houses. There is definitely no connection between the driveways.