A421 upgrade | Central Bedfordshire Council

A421 upgrade

A421 dualling

About the project

We're working with Milton Keynes Council to upgrade the A421 road by installing dual carriageway from the Eagle Farm roundabout down to Junction 13 of the M1. That stretch of the A421 road is used by almost 30,000 vehicles a day.

The upgraded road will provide future and existing residents with greater opportunities for leisure activities, housing and employment. It will also help take traffic away from local parishes, increase safety, and benefit local businesses as well as commuters.

Read background papers (link opens in new window)


As well as easing congestion, the upgraded A421 road will help improve access to planned developments in Central Bedfordshire, such as the 5,000 homes proposed in new villages in the Marston Vale area (in our Local Plan), as well as 40 hectares of employment land. The upgraded road will also help improve access to Ridgmont train station, which is due to be enlarged as part of Network Rail’s East-West Rail project.

There will be a new cycleway and footway (3 metres wide) along the length of the newly dualled A421. This will run from Cranfield Road bridge through to Hayfield Farm (near the M1 junction), along the southern side of the carriageway. This will then lead to a new bridge towards Hulcote, which will include a bridleway. There are no safe routes for pedestrians across the A421 currently, so this bridge will greatly improve facilities for pedestrians, cyclists and horses.


The South East Midlands Local Enterprise Partnerships (SEMLEP) Local Transport Board (LTB) has identified four major projects. Of these, the A421 road dualling is listed as the highest priority, as it is anticipated to make a significant contribution to the area, including 2,500 jobs.

In March 2018, the Department for Transport announced that it had approved £23.5 million worth of funding from SEMLEP's Local Growth Fund for the project. Both ourselves and Milton Keynes Council are also each contributing up to £3 million towards this project.