Lismore police are investigating a road rage incident and are appealing for witnesses to come forward.

"About 5.20pm on Thursday the driver of a blue Commodore on Dibbs Street became involved in an assault incident that resulted in a victim being hospitalised," crime prevention officer Senior Constable David Henderson said in a post on the Richmond PD Facebook page.

"This incident was witnessed by people driving past and walking their dogs. Police are very interested in speaking to these witnesses."

"If you witnessed this incident - or are the driver of the blue Commodore - please email 47093@police.nsw.gov.au or call Lismore Police on 66260599 Police reference is E72555971."