From Friday (22 September) drivers will benefit from the extra capacity and improved road information on the six mile section between Leeming and Catterick.
Once finished, the full scheme between Leeming and Barton will complete the missing link of motorway between London and Newcastle, using the M1 and A1 (M), as well as improving journey times and increasing safety.
Transport Secretary Chris Grayling said:
Upgrading the A1 in a big priority for the Government and this is the latest stage in our broad ranging investment plan for better transport in the north, cutting congestion and journey times.
Highways England project manager, Tom Howard, said:
We are pleased to be able to open this section ahead of the main completion to give drivers the benefits of motorway standards as well as smoother and safer journeys.
This is an important milestone and means we are now halfway to completing this major scheme on this vitally important route.
Over the autumn period our focus will be on the remainder of the project including completing the local access road between Scotch Corner and Brompton-on-Swale and opening the new Fort Bridge which will provide and new east – west link to Catterick for pedestrians, cyclists and drivers.
Once Fort Bridge is fully open by the middle of November, the next major milestones will be the opening of the motorway between Scotch Corner interchange and junction 56 at Barton, and between Catterick junction and Scotch Corner interchange. The scheme will be fully open by Winter 2017/18.
Complicated ground conditions have impacted on the method used to stabilise the embankment near the River Swale. This has resulted in an extension to the planned completion date. Highways England is working with contractors to resolve the issue as quickly as possible.
When fully open, journey times between Leeming and Barton are expected to be reduced by approximately 20 per cent.
For more details, visit the scheme website.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.
Follow this news feed: HM Government