Motorists will have to contend with a series of closures on the A14 in the coming weeks.
Widening work on the A14 between Junctions 7 and 9 is continuing in a bid to ease congestion on the stretch of road adjacent to Kettering.
The closures will allow contractors to switch the current contraflow and direct most traffic along the new eastbound carriageway.
Work will then start on widening the westbound carriageway, and drivers have been told to allow up to 20 minutes extra for journeys.
The road will be closed between junction seven, for the northern bypass and Telford Way, and junction nine, the Wellingborough turn-off.
The eastbound carriageway will be closed from 8pm between Monday, September 1, and Saturday, September 6, with the road being reopened to traffic at 6am on Tuesday, Wednesday, Thursday and Friday, and at 9am on Saturday and Sunday.
The westbound carriageway will also be closing for five nights from September 6 until September 10. The closures will be from 8pm until 6am.
Meanwhile, from 8pm on September 19 until 6am on September 22, Junction 8’s westbound entry and exit slip roads will be shut, including during the day.
Highways Agency project manager Raymond Chitwanga said: “This is an exciting time in the development of the project.
“It means the eastbound carriageway is available to traffic and we can now start work on the westbound carriageway improvements.
“We advise drivers to take extra care on their journeys during this time as the road layout will be changing considerably and would like to remind them that a 40mph enforcement remains in place throughout the roadworks for the safety of road users and our workforce.”