The incident has caused long delays for drivers (Image: AA traffic maps)
A car was left on its roof after flipping during a crash on the A1(M) near Welwyn.
Police were called at 4.32pm today (Tuesday, August 27) to reports of a collision near junction 6.
Two vehicles were involved in the incident - a Vauxhall Astra which had overturned on its roof, and a Toyota Prius.
The ambulance service rushed to the scene and checked over the people involved, confirming that nobody was injured.
The incident has led to severe rush hour delays for motorists after two lanes were closed.
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