Police are appealing information after a motorist drove at a traffic management worker in Chelmsford earlier this month.
The incident took place in Moulsham Hall Lane at around 9pm on September 2.
A traffic management system was in place close to Chelmsford City Racecourse before and after a concert.
Police say that during the event a motorist driving a black Fiat Ducato horsebox got out of his vehicle and dismantled traffic barriers.
He then drove at a traffic management worker following an argument, causing minor injuries, before driving off.
No arrests have been made and enquiries are ongoing.
Anyone with information is asked to call Stanway Roads Policing Unit on 101 or Crimestoppers anonymously on 0800 555 111.
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