Norfolk Police say there are long delays both east and westbound on the A47 at Postwick, east of Norwich.
Police say the delays were caused by accdents on both carriageways earlier this morning.
The campaign to upgrade the A47 has had another boost with the visit of Robert Goodwill, the Parliamentary Secretary of State for Transport, who has driven along the road.
The A47 Alliance which represents businesses and local authorities along the A47 and A12 from Lowestoft to Peterborough has given the Minister an update on their priorities for the road.
They're calling for £416 million of targeted improvements over the next 6 years and a commitment to fully dual the A47 at a cost of £1.4 billion.
Doing this would cut 55 minutes off journey times and would lead to more jobs, homes and an economic boost.
16,890 more jobs
10,585 new homes
An annual £706 million boost in economic output ( GVA)
The Minister is travelling the whole route including the A12 at Lowestoft up to the A1 at Peterborough. He will also meet local MPs along the way.
Toby Coke, Chairman of Norfolk County Council's Environment, Development and Transport Committee, said.
"What we need is firm commitment to fund the upgrading of the entire A47. The Government talks about infrastructure improvement, and it is needed here in Norfolk and our neighbouring counties now.
Police are appealing for witnesses following a three-car crash on the A47 Acle Straight in Norfolk.
A silver Honda Jazz, black Nissan Qashqai and a black Kia Picanto were involved in a collision at the Halvergate turning on Saturday 21st June.
One person suffered minor injuries.
A £10,000 reward has been offered to help catch a driver who caused a crash which led to the death of a Norfolk woman.
Kim Utting died on the A47 in Norfolk last year. The man who hit her also suffered serious injuries.
He has offered the money to help track down the driver of a black car who it is believed caused the accident.
A man from Dereham who was seriously injured last year in a collision on the A47, in which a woman died, has offered a reward for information.
Andrew Scottow was driving a red Skoda Felicia on the 14th February 2013 when he swerved to avoid a black car which was driving erratically.
This caused Andrew to lose control of his car and he was involved in a head on collision with a green Peugeot 406.
52 year old Kim Utting who was a passenger in the green Peugeot died as a result of the collision.
Andrew Scottow himself sustained serious injuries and spent weeks in hospital.
Despite numerous appeals, the identity of the black car is still unknown so Mr Scottow is now offering a £10,000 reward for information.
Someone knows who the driver of that black car was. I want them to think about what the result of that driver’s actions has been to Mrs Utting’s family, my long term injuries, and hopefully, with a bit of incentive, they will come forward and do the right thing.”
A nineteen million pound improvement project is due to start on the A47 at Postwick near Norwich.
Government funding was granted 5 years ago, but it's been subject to a number of legal challenges.
The work is intended to release land for up for 1,600 homes and make it easier to build a planned northern bypass round the city.
Police say the accident on the A47 near Norwich has now been cleared and the road is open again.
Police say a lorry, a tractor and a tanker were involved in a crash which has closed the A47 Eastbound just outside Norwich. The incident took place on the section of the road heading towards Harford Bridges just after Thickthorn roundabout.
Norfolk Police say there do not appear to be any major injuries but the road will be closed for some time while investigations are carried out.
Traffic is being diverted off the A47 and Norfolk Constabulary would urge motorists to try to find alternative routes at this time.
The A47 Southern bypass has been blocked East bound by a crash between the Thickthorn roundabout and A140 junction.
A £19m scheme to improve a major road junction in Norwich is on course to start next month after ministers released the funding.
The work on the Postwick junction of the A47 aims to increase capacity.
Norfolk County Council said the improvements would allow nearby business and housing developments to go ahead, creating five thousand jobs and unlocking £82m of private investment.