The work which takes place overnight will also include repair works to Tempsford Bridge over the River Ouse.

Both the northbound and southbound carriageways of the A1 over the
7.5 mile stretch between Biggleswade North Roundabout to Black Cat Roundabout will be repaired to improve the road condition and reduce the noise level.

The work will take place from 8pm to 6am on Monday to Thursday and on Fridays between 9pm to 6am and will involve some carriageway closures.

Clearly signed diversion routes will be in place. There will be no work over the August bank holiday weekend (Friday, 22 August to Tuesday, 26 August) and the work is due to be completed by late August.

The work will be carried out in four phases:

* Monday, July 21, to Saturday, July 26: Overnight closure of the northbound carriageway between the Biggleswade North Roundabout and Sandy Roundabout.

* Monday, July 28, to Saturday, August 2: Overnight closure of the northbound carriageway between Sandy Roundabout and the Black Cat Roundabout.

* Monday, August 4, to Tuesday, August 19: Overnight closure of the southbound carriageway between the Black Cat and Sandy Roundabouts.

* Tuesday, August 19, to Saturday, August 30: Overnight closure of the
A1 southbound between the Sandy and Biggleswade North Roundabouts.

The diversion route for the Northbound closure between Biggleswade North and Sandy roundabouts, and the Northbound closure between Sandy and Black Cat Roundabouts, is as follows:

Traffic wishing to travel northbound on the A1 will exit the A1(M) at junction 10 for Baldock, onto the A507 westbound to Clophill roundabout.

Motorists will then join the A6 northbound to the A421 roundabout at Elstow and then onto the A421 eastbound to rejoin the
A1 at Black Cat roundabout.

When the A1 southbound is closed, traffic will follow the same diversion route in the opposite direction. Local access will be maintained.