A man has been stabbed on an M5 slip road in Weston-super-Mare and police are now hunting the attacker.
The incident happened at junction 21 on Friday evening after an altercation at the traffic lights.
A 26-year-old man, a passenger in a vehicle, suffered stab injuries after a "dispute" with the driver of another vehicle, Avon and Somerset Police say.
The force was called to the scene at 10.10pm by the ambulance service.
The victim was taken to hospital to be treated for injuries, which police said were not life-threatening.
"We've launched an investigation after a man was seriously assaulted on the southbound slip road of the M5 at junction 21 (Weston-super-Mare) on Friday night," Avon and Somerset Police said in a statement.
"At about 10.10pm, we received a call from the ambulance service to attend this location after a 26-year-old man suffered stab injuries. He was taken to hospital for treatment to injuries which are not life-threatening.
"The victim was a passenger in a car which had just exited the M5 at this junction and was at a set of traffic lights. A dispute then ensued with the driver of another car, following which the victim was stabbed.
"The offender was in a dark coloured car and we're making urgent enquiries to locate this vehicle. One lane of the slip road remains closed so we can carry out a further examination of the scene."
Anyone who witnessed the incident is urged to call 101 and give the call handler the reference number 5220152683.
Alternatively, anyone with information can contact the independent charity Crimestoppers 100 per cent anonymously on 0800 555 111 or via their Anonymous Online Form.
No personal details are taken, information cannot be traced or recorded and you will not go to court or have to speak to police when contacting Crimestoppers.