A428 Black Cat to Caxton Gibbet improvements

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About the scheme

We are proposing to upgrade the route between the Black Cat roundabout and Caxton Gibbet roundabout with a new 10-mile dual carriageway and a number of junction improvements. The scheme will improve journeys between Milton Keynes and Cambridge, bringing communities together and supporting long term growth in the region.

What’s happening now?
In summer 2019, we consulted on proposals for the new dual carriageway and junction improvements. We listened to your feedback and as a result have improved the scheme design, making changes to our proposals. Many of these will help minimise impacts on the environment and local communities. We consulted on these changes in June and July 2020.

Your feedback will inform the development of the scheme before we submit our application for planning consent. As part of our application, we will also publish a Public Consultation report summarising the feedback on our proposals.

The best way to find out about our 2020 consultation is to visit our virtual room. Alternatively, go straight to the online survey or download materials.



Improve safety at junctions, side roads and private accesses by reducing traffic flows on the existing A428.

Economic growth

Enable growth in jobs and housing and improve connections between people and jobs.


We will cut journey times by more than a third at peak times between Black Cat and Caxton Gibbet junctions.


Improving the safety of horse riders, cyclists, walkers and connecting communities.

This video is illustrative and reflects the design at statutory consultation, July 2019.

Latest news

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Pre-register for consultation materials
June 10, 2020 10:40

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Consultation update – the highlights
February 12, 2020 12:04

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Understanding the history beneath our feet
December 24, 2019 11:49

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