Work is due to start on a £5m project to help reduce congestion on a busy commuter route into Northampton.
The scheme which focuses on the A45, particularly the Barnes Meadow Roundabout, also aims to improve road safety and improve bus routes.
The county council hopes the work, which starts on Monday, will reduce the time it takes to make the journey from Wellingborough and Earls Barton into Northampton.
The scheme is funded by the government.
The measures include:
- An extra lane for vehicles with more than one person travelling in them on the A45 westbound off the slip road approaching Barnes Meadow and also on the Barnes Meadow Roundabout
- Traffic light improvements on bus routes from Wellingborough and Earls Barton into Northampton town centre to increase the reliability of buses
- Extra lanes on the Barnes Meadow Roundabout to ease congestion
- New traffic lights on the Rushmere Road entry to the roundabout to improve safety by enhancing junction capacity
Heather Smith, county council cabinet member for transport, minerals and waste, said: "There's no doubt that this is one of the busiest routes in the county and work needs to be done to improve travelling times.
"I'm confident these measures will reduce congestion, by improving the overall capacity of the intersection, as well as encouraging bus travel and car sharing."