We’re upgrading the route between the Black Cat roundabout and Caxton Gibbet roundabout with a new 10-mile dual carriageway and a number of junction improvements. This billion pound scheme will improve journeys between Milton Keynes and Cambridge, bringing communities together and supporting long term growth in the region. 

We've moved into construction and expect the road to open in 2027. 

You can find out more in our About the scheme page and watch our short scheme video.

Contact us

If you have questions or would like more information, please contact us:

Phone: 0300 123 5000

Email: info@A428.co.uk

Follow us on Twitter @A428Cat

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