Sussex Police are currently searching for any witnesses to a violent attack on London Road which left a man suffering from serious head injuries.
The assault took place at around 7.50pm and involved occupants of two vehicles. A man is believed to have been hit in the head with a steering wheel lock. The man was taken to hospital with serious head injuries.
Detective Donna Ward of Sussex Police said: "This was an isolated incident between two vehicles. The two cars have been involved in a road rage incident and this has subsequently lead to a physical altercation.
"We believe there was a bus going past the two vehicles at the time of the incident. We are appealing for anyone on that bus or members of the public walking past to come forward with any information they may have."
Two men have been arrested in connection with the assault and the investigation is still ongoing.
To report information please go online or call 101 quoting reference 1193 of 21/04.