Police are investigating an allegation of dangerous driving on the A66 eastbound, near the Center Parcs junction.
It is reported a black DAF articulated lorry attempted to overtake a Volvo rigid lorry at about 5.25am on Tuesday January 12.
A spokesperson from Cumbria Police said:
"Oncoming cars are reported to have had to take evasive action, as well as the articulated lorry damaging the rigid lorry then failing to stop.
"Officers are appealing for witnesses to come forward, in particular the occupants of the cars, any dashcam footage that is available – or any reports of similar incidents around that time.
"Anyone with information should call PC Alistair Jones on 101, referring to incident 114 of January 12."