An overturned caravan led to congestion on the A82 southbound near Balloch in West Dunbartonshire this afternoon.
Traffic Scotland said some motorists were delayed for up to an hour after the incident involving a car, a caravan and a lorry.
An ambulance was sent to the scene at 1:15pm, according to a spokesman for the Scottish Ambulance Service.
He said: "We were on the scene but the patient refused treatment. A caravan was overturned near the Stoneymollan Roundabout."
A spokeswoman for Police Scotland said officers were also sent to the area at 1:15pm.
She added: "The incident involved a car, a caravan and lorry on A82 Glasgow-bound carriageway. We are not aware of any injuries."