Thames Valley Police is appealing for witnesses after an assault in Wigmore Lane in Reading on Sunday.
At around 9.15pm the victim, a 21-year-old man, was driving along Portman Road on to Wigmore Road in the direction of Oxford Road, in his silver Vauxhall Corsa. The vehicle in front of his, a silver Volvo V70 stopped and the driver got out.
An argument followed between the two drivers resulting in the driver of the Volvo punching the victim in the face causing facial injuries and a cut lip.
The offender is white, aged in his twenties or mid-thirties of average build, with short brown hair. He was wearing casual clothing.
A man has been sentenced to nine months behind bars suspended for 18 months, for dangerous driving during an incident on the A27 at Shoreham in Sussex last June.
Mark Bennett, 37, of Brighton Road in Worthing was found guilty of dangerous driving at Brighton Crown Court on 10th January 2013.
He was also sentenced to a three month curfew order between 9pm - 5am, 150 hours of unpaid work, required to take an extended driving test, and ordered to pay £3,500 in court costs.
Sussex Police said officers were called to a road rage incident on 6.45pm on 2nd June 2012.
They found a damaged silver Vauxhall Corsa on the Eastbound carriageway of the A27 Shoreham flyover. The driver said that starting from the Lancing Manor roundabout Bennett had overtaken their vehicle and braked directly in front of them causing them to lose control and collide with Bennett.