A man is his 40s has been killed in the first death on the Norwich Northern Distributor Road.
The driver was pronounced dead at the scene after a collision on the A1270 NDR at Horsham St Faith near the A140 slip road towards Hellesdon at around 10pm on Wednesday evening.
Police believe the man, who had stopped his blue BMW on the roadside, was inspecting the car for damage after hitting an animal.
He was then hit in a crash between two vehicles - an orange MG3 driven by a man and a small silver car similar to a Peugeot 106 or Citroen C1 driven by a woman thought to be in her 20s.
The male driver remained on the scene and police were trying trace the female driver who initially stopped but then left.
However, police have confirmed that the female driver has got in touch.
Inspector Chris Hinitt, from the Norfolk and Suffolk Roads and Armed Policing Team, said: "We believe the driver of the BMW may have hit an animal and stopped on the roadside to check the damage.
"He has then been involved in a collision with two other vehicles."."."
A section of the A1270 was closed in both directions from around 10.30pm on Wednesday evening and reopened at 4am Thursday morning.
Officers are keen to hear from anyone who may have any information or witnessed the collision, particularly anyone who saw the manner of driving of any of the vehicles involved.
Anyone who can help should contact the Serious Collision Investigation Team on 101 or email sciu@norfolk.pnn.police.uk.
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