Archaeological work has revealed more of its length than is in use nowadays. Its course is regarded as having run from the boundary between
Ailsworth and
Castor, at the north-west corner of Normangate Field, just north of the
River Nene (TL113980). This is where it left the Roman
Ermine Street, north-west of
Durobrivae in what was by the end of the 2nd century, an extensive industrial region producing
tiles,
metalwork and particularly,
pottery. To the south of this point, Ermine Street runs along the edge of
The Fens; but to the north, lies further inland. King Street continued the course nearer the fen edge. While Ermine Street crossed the
Welland near the natural ford at
Stamford, King Street crosses at
Lolham Bridges, which required more engineering. At Kate's Bridge, the road crossed the
River Glen. Until the 1820s the road still used the same crossing point despite the river's having moved from it at some time, probably well over a thousand years before. At Park Wood, the road appears to have come close to the
Car Dyke but this is not well supported by evidence. From near Thurlby crossroads, the Roman line headed straight for the point at which
Bourne Abbey was later built on. In this length, there are points where the road seems to show in the modern landscape - for example, here In the south, the modern road lies on the Roman one which continued through Elsea Wood and along the field boundary to its north. The Car Dyke lies to the east and the boundary between Elsea Wood and Math Wood seems to lie along the edge of the 2nd century road verge, which was cleared for security. The carriageway, the Car Dyke and the Math Wood boundary are all parallel here. When allowance is made for the now-missing outer works of the Car Dyke, the carriageway lies halfway between the other two features. North of Bourne, little of the road is still in use but it has left its mark in the form of property boundaries and soil marks. This section is sometimes called the 'Long Hollow Road' because some of it runs along the bottom of the Long Hollow, a broad, shallow valley which is the upper part of the
basin of the
River East Glen. From Bourne Abbey, it passed along Meadowgate, then by Cawthorpe to Clipseygap Lane,
Hanthorpe and the Roman town at
Stainfield. On the
boulder clay ridge, it forms boundaries of woods before, in the East Glen valley, its line is picked up by a minor road at
Hanby. It passed through the small Roman town at
Sapperton and up the Long Hollow to
Ropsley Heath whence it is more or less closely followed by a modern road to its junction with Ermine Street, a kilometre south of the Roman town of
Ancaster. The road can be seen as a
soil mark in The Long Hollow, just right of centre in [http://www.multimap.com/map/photo.cgi?client=public&X=501000&Y=336000&width=700&height=400&gride=&gridn=&srec=0&coordsys=gb&db=&pc=&zm=0&scale=25000&multimap.x=227&multimap.y=53 this aerial photograph. ==Economic significance==