A man suffered a serious facial injury after being attacked through his van window during morning rush hour.
The victim, in his 40s and from Wirral, was sat behind the wheel on Station Road at the junction with Westminster Road in Ellesmere Port when a man got out of a blue car and assaulted him.
It is being described as a 'road rage' attack by police and the victim is said to be "extremely shaken up".
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The attack happened between 8.30am and 9am on Tuesday, April 13 an the victim was taken to hospital in an ambulance.
A 50-year-old man from Merseyside has been arrested on suspicion of causing grievous bodily harm, driving without due care and attention and driving otherwise in accordance with a licence in connection with the incident.
After being questioned in custody by officers, he has been released under investigation pending further enquiries.
Cheshire Police are now urging any witnesses to come forward.
Detective Constable Chris Tyrer, of Ellesmere Port CID, said: "This road rage incident left the victim with facial injuries, including a serious one, that required hospital treatment.
"It also left him extremely shaken up.
"We are determined to establish exactly what took place and who was responsible.
"Enquiries in relation to the incident are ongoing.
"As part of our enquiries we want to speak to anyone who was in the area and witnessed anything that may help our investigation.
"The assault took place at a busy junction with a high volume of traffic.
"If you were in the area and have any information or dashcam footage that may aid the investigation, please get in touch."
