A major 5.5km bypass incorporating three new bridges and three major culverts. At Arthingworth Road, a new overbridge provides a gateway to the Jordan valley. In addition, two single span bridges, of identical form, cross the River Ise and the London to Leicester Railway line on the northern section of the road.

Within this environmentally sensitive area, circular culverts cross watercourses at the River Jordan and the A14 interchange, and an undertrack crossing of the railway near the market town of Desborough was required to drain the northern part of the new carriageway. To avoid unsightly deep cuttings, the new alignment was designed to follow the profile of the existing terrain. Across the valleys of the River Ise and the smaller River Jordan, new embankments up to 14 metres high were constructed.

The three interchanges at the A14, Braybrooke Road and existing A6 junctions are now illuminated and extensive measures were used to enhance the environment of the people and wildlife influenced by the scheme. Great crested newts, badgers, bats and ground nesting birds were accommodated and the demands of the Environment Agency necessitated the provision of a considerable number of detention ponds and vegetative treatment areas designed by Tony Gee to reduce surface run-off and maintain water quality.

Tony Gee prepared material for public exhibitions and meetings in both Rothwell and Desborough as part of the public liaison process.