More than £6 million worth of funding has been announced this week to renew the A39 at Trispen.
The 8km route between Truro and Carland Cross carries around 13,000 vehicles a day.
Now the route is to be resurfaced, safety fences will be added, and the draining system will be refurbished. There will also be new provision for cyclists along the route.
Transport Secretary Patrick McLoughlin confirmed the upgrade would go ahead after his visit to Cornwall yesterday. The Department of Transport will provide £5.22 million towards the scheme, with Cornwall Council putting in a further £1.1 million.
The work will start later this year and should be finished by March 2016.
Cornwall Council have welcomed the confirmation of the new funds, but say a long term maintenance programme is needed:
A man in his twenties has died after his car left the road and hit a tree. He was pronounced dead at the scene.
His family have been informed.
The crash happened at Perranarworthal on the A39 near Truro.
The Truro-bound carriageway of the A39 remains closed while officers carry out a forensic examination of the scene. Drivers are asked to find an alternative route.
There's been a serious collision between a car and a log-carrying lorry on the A39 near Bideford in North Devon.
The lorry has overturned, shedding its load of logs across the carriage way.
Police and other emergency services are at the scene. Paramedics treated the car driver at the scene and he has been taken to North Devon District Hospital with potentially life threatening injuries.
The road closed has been closed at Westleigh and Roundswell, and is expected to remain closed for most of the day.
The A39 is closed in both directions after an accident between A389 / B3314 Gonvena Hill (The Ball Roundabout, Wadebridge) and B3267 (St Teath).
The road is closed as fire crews battle a large fire at a thatched cottage in Horns Cross near Bideford. 15 fire engines have been sent to the scene. More details as we get them.
Snowploughs have been hard at work on the A39 over Exmoor this afternoon. The stretch between Porlock and the turn-off for Brendon 6 miles towards Lynmouth is still closed after strong winds created drifts over six feet high.
The road is currently blocked between Porlock Hill and the turning for Brendon 6 miles towards Lynmouth. High winds have created snowdrifts over 6 feet high and snowploughs equipped with blowers are working to clear the road. The temperature this afternoon was 3c at Porlock.
Our reporter David Woodland is out on the A39 over Exmoor and has just sent this picture. The road is still partially closed from the top of Porlock Hill to the turning for Oare, as high winds have created snowdrifts up to 6 feet deep. Snowploughs have been at work all afternoon.
Snowploughs and snow blowers are struggling to cope as very strong winds blow snow off the moor.
The A39 is still blocked in both directions due to snow between New Road (Oare, Exmoor) and Hall Hill (Brendon), on the Somerset/Devon border.