A428 Black Cat - Caxton Gibbet

Scheme outline

Upgrade of the existing A428 to dual two-lane expressway standard between the A1 at Black Cat Roundabout and the A1198 at Caxton Gibbet. This will complete a continuous expressway route between the M1 near Milton Keynes and Cambridge, and contribute to completion of the proposed Oxford-Cambridge expressway.

The exact alignment of the new route is not yet published but is likely to take a new line east from Black Cat Roundabout, passing south of St Neots and Little Barford before rejoining the line of the existing A428 and forming an improvement to the existing route for the rest of the distance to Caxton Gibbet.

The scheme is part of the first Road Investment Period which means that construction should begin before 2020.

In preparation
Bypass or realignment
for use by all traffic
Highway authority
Central Government


What's happening on this scheme? You can add a progress update if you know more. Add a progress update
4 May 2016

Residents in nearby villages such as Roxton have already been approached as part of official inquiries into land ownership.

16 March 2017

The consultation is now open to select route options and grade separation at Black Cat.

21 August 2018

Three routes were proposed before last summer with the promise of an announcement in the autumn. Locally, consensus appeared to favour the Orange route as it ran closest to the existing road and affected less open countryside.

Highways England have yet to issue a decision, and now say "the start of works has moved to Roads Period 2 (between 2020 and 2025) and our aim is to start construction in 2021/22 subject to the Development Consent Order application".

More information


With thanks to James Croucher for information on this page.