MOTORISTS were left facing tailbacks on the A19 northbound following two separate crashes involving six cars.
Four cars were involved in the first collision around 8am today on the northbound carriageway of the Tees flyover, near Stockton, prior to the Portrack turn-off.
Minutes later, there was a separate two-car smash in the same area.
Ambulances arrived and took three of the drivers to the University Hospital of North Tees for checks.
None of them are thought to have suffered any serious injuries.
The crashes cause huge delays for commuters until the road was cleared shortly after 9am.