A421 upgrade

Diversions and closures

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Planned closures

The A421 between the Eagle Farm Roundabout up to M1 Junction 13 will be closed temporarily on Friday 11 September at 8pm until 6am on Monday 14 September (or earlier if our works are completed sooner).

This closure will allow us to carry out works under where the temporary bridge was located together with more resurfacing works, safety barrier works and road markings.

We appreciate your patience throughout these closures.


While the M1 will be open, motorists should be aware that Highways England are closing the slip roads at Junction 14 of the M1 on Friday night and therefore the M1 should not be used as a diversion. Please follow the signed diversion route.

Diversion routes

We will only make closures when the M1 road is open. However, our diversions show the alternative routes for drivers who can’t or who don’t want to use the motorway.

There is a diversion route for drivers who would normally take the A421.A421 closed diversion route This route avoids villages and goes via the A421 Bedford Western Bypass and then the A422 towards Milton Keynes.

There is also a diversion route for those who would normally take the Cranfield Road.Cranfield road bridge diversion

The lorry restrictions remain in place for the local villages.

Temporary closures to public rights of way will be in effect during the work.

Download the cycle diversion route.

We apologise for any inconvenience caused and thank you for your patience during the roadworks.

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