A428 Black Cat to Caxton Gibbet improvements

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About the scheme

Creating a reliable, high quality route from Black Cat junction to Caxton Gibbet junction that will meet the future traffic needs of the region.

Why is this needed?

The A428 between St Neots and Caxton Gibbet is the only stretch of single carriageway between the M1 near Milton Keynes and Cambridge. It is an important link between the M1 and the M11, connecting the communities of Bedford, St Neots, Cambridge and Cambourne. Around 22,000 vehicles travel between Cambridge Road and Caxton Gibbet every day. With considerable local housing and job growth expected, this number is likely to grow to 27,000 vehicles by 2038.

People that use the A428 regularly experience congestion and delays, especially in rush hour. The situation is made worse by the lack of alternative routes.

We’re planning to cut the average commute between Black Cat and Caxton Gibbet junctions by more than a third, saving up to 10 minutes on every trip.

What are we proposing?

Our plans are to upgrade the route between the Black Cat roundabout and Caxton Gibbet. A new 10 mile dual carriageway will connect the Black Cat roundabout and Caxton Gibbet roundabout.

Our proposals also include:

New roads, junctions and bridges

  • A new three tier junction at Black Cat roundabout which will allow traffic to flow freely on the A1 by travelling under the junction and on the new dual carriageway over the junction
  • New junctions at Caxton Gibbet and Cambridge Road, connecting the new dual carriageway to the existing A428 and increasing the local road network’s ability to cope with unforeseen incidents
  • New Roxton Road link to connect Wyboston and Chawston
  • New bridges crossing over the new dual carriageway at Roxton Road, Barford Road and Toseland Road
  • New bridges over the River Great Ouse and East Coast Main Line railway

Retention of existing roads and access

  • Retention of the existing A428 between St Neots and Caxton Gibbet for local traffic and public transport
  • Retention of existing bus stops on the A1
  • All local roads maintained although direct access to the A1 from some roads will be removed for safety reasons
  • Safer and alternative access to side roads at Chawston, Wyboston and Eltisley

Walkers, cyclists and horse riders

  • Better routes for walkers, cyclists, and horse riders that maintain links with the existing public rights of way

Better connections

  • Better connections to St Neots and its train station


  • Close alignment to the existing A428 helps to reduce the environmental impacts of the scheme

Explore our proposals

  • To view the scheme through augmented reality, go to the App store for your mobile device and search for A428 Highways England
  • Managing traffic flow during construction. Our visualisation shows how we’ll keep the traffic moving while we build the new Black Cat junction

Route map

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