A605 road

The A605 strikes north from junction 13 of the trunk A14 road through the eastern parts of Thrapston, skirts the village of Thorpe Waterville, bypasses Oundle to its east, crosses the River Nene, reaches the eastern limit of the A427 at a roundabout, skirts to the west of Eaglethorpe, crosses into Cambridgeshire near Elton Hall, to reach the A1's junction 17 whereupon it overlaps the A1 road. It then continues north east through Whittlesey before terminating at a junction with the A141 between March, Cambridgeshire and Guyhirn. Basically, except for a short section at Oundle, its route follows the south bank of the River Nene.

The road used to start at the A6 just north of Higham Ferrers and run to Thrapston and Peterborough, following the line of the Roman Road between Irchester and Durobrivae . The road split in two just before the A6 with one branch joining the A6 by the Irthlingborough Viaduct and the other at the top of the hill as the A6 enters Higham Ferrers. The later branch survives as a local access but the former has been returned to field.

Wikipedia