An 84-year-old man has been charged by police after dashcam footage emerged last week allegedly showing the man's car nearly hitting a truck in New South Wales.

The footage from Friday morning allegedly shows the man's white station wagon overtaking and then nearly colliding head-on with a B-Double truck near Cooma on the Monaro Highway.

Speaking to the ABC on Sunday, truck driver Richie Gillman said he believed the car was going at least 130 kilometres per hour when it passed his vehicle.

Police from the Monaro Highway Patrol said they made inquires and spoke to the elderly man after seeing the video.

The Cooma man has been charged with dangerous overtaking.

He will appear in the Cooma local court in August.