Drivers warned of overnight A43 closures through Northamptonshire during 2026
Drivers using the A43 through Northamptonshire are being warned of a series of overnight road closures set to take place throughout 2026 as part of a major programme of maintenance and improvement works.
National Highways has confirmed that a temporary traffic regulation order will allow sections of the A43 and connecting roads between Ardley, Brackley, Towcester and Rothersthorpe to be closed overnight to enable works to be carried out safely.
The works are scheduled to take place between 7pm and 6am, extending to 7am on Saturday and Sunday mornings, during a period beginning on January 2, 2026, and running when required until December 23, 2026.
Key sections affected include the A43 between the B430 and M40 Junction 10 at Ardley and the A421 and B4031 at Brackley, as well as the stretch between Towcester and Rothersthorpe North Roundabout, including junctions with the A5, Towcester Road and the A5123.
Additional restrictions will apply on the A43 at M1 Junction 15a, including the westbound carriageway between the southern A43 roundabout and the M1 northbound slip road, as well as the section between Rothersthorpe North Roundabout and Swan Valley Way Roundabout. Slip roads, link roads, lay-bys, service roads and bus stop areas connected to the affected stretches may also be closed when works are taking place.
National Highways said the length and timing of individual closures will vary, depending on the nature of the work being carried out on each occasion. Signed diversion routes will be in place during closures, directing traffic via alternative A43 junctions and surrounding local roads.
The restrictions will not apply to emergency services, works vehicles or winter maintenance vehicles, and will only be enforced when clearly indicated by traffic signs.
The order comes into force on December 27, 2025, and will remain valid until December 23, 2026. Motorists are advised to plan journeys in advance and allow extra time when travelling overnight along the route.
The public notice was published on the Public Notice Portal.