Four people arrested on suspicion of murder after a man died in Kirkham on Thursday have been released as enquiries continue.
Police think Andrew Dean from Wesham was involved in a collision with another car after getting out of his vehicle to speak to the driver, close to the junction with Freckleton Street and the Kirkham bypass.
An 18-year-old man has been released on bail pending further enquiries.
An 18-year-old woman, and two girls aged 17 and 16, have been released without charge.
They are all from the Greater Manchester area.
Police were called around 4.15pm on Thursday after reports of an incident at the junction of Freckleton Street and the A583 Kirkham Bypass.
Officers attended and a man was found in the carriageway with head injuries. Sadly Mr Dean was pronounced dead at the scene.
Detectives believe Mr Dean, 46, had been driving a white Renault Master van westbound on the A583 when he was involved in an altercation with another motorist driving a metallic blue Nissan Micra car.
Both vehicles later stopped close to the junction with Freckleton Street and Mr Dean got out of the van to speak to the Nissan driver. It is believed the Nissan then collided with Mr Dean who suffered fatal injuries.
Around 4.45pm police stopped a blue Nissan Micra between junctions 6 and 5 of the M61.
Four people were arrested at the scene.
Enquiries are on-going.
Police are keen to trace anyone with dashboard mounted camera footage of the incident, as well as any footage of either vehicle, before the collision took place.