Major roads will be closed overnight for works at the Black Cat roundabout from Thursday (April 25). The closures will be on the A1, A421, and Black Cat roundabout for three nights.
The closures will be in place on Thursday, Friday, and Saturday (April 25 to 27 inclusive) from 9pm to 5am. Diversions will be in place during the closures.
A National Highways spokesperson said: "As we continue with our work to upgrade Black Cat roundabout, the next step will be to install safety barriers, continue clearing the site of obstacles and carry out maintenance on CCTV cameras. These works will ensure that traffic can continue to use the A1, A421 and the Black Cat roundabout safely during construction.
You can see more details of the closures and diversions below.
A421 westbound, Black Cat roundabout to Renhold. All traffic will divert via A1 southbound, A603 at Sandy then via Moggerhanger and rejoin the A421 at Cardington.
Bedford Road between Roxton Garden Centre and Black Cat roundabout. All traffic will divert via Roxton Road, Staploe Road, Bushmead Road to Eaton Socon and then south on the Great North Road (B1428) to Wyboston.
Friday, April 26
A421 Eastbound, Renhold to Black Cat roundabout. Eastbound and local traffic heading to A1 southbound will use the A603 at Cardington then via Moggerhanger to Sandy and rejoin A1 southbound.
A1 Northbound Black Cat roundabout to Wyboston. A1 Northbound traffic will travel southbound on the A1 and follow the diversion via the A505, A1198 and A428 to rejoin the A1 at Wyboston.
Saturday, April 27
A1 Northbound, Sandy to Black Cat roundabout. A1 Northbound traffic will use the A603 at Sandy then via Moggerhanger and rejoin the A421 at Cardington.