A1 delays following accident between Grantham and Stamford
An overturned car and caravan are causing long delays on the A1 southbound.
The accident happened at about 7am just north of Colsterworth and emergency services attended.
Traffic backed from the site at Little Ponton, back to the A607 junction of the Grantham by-pass.
Delays exceeding 30 minutes were experienced by commuters.
However, by 10am, AA Roadwatch said the delay was down to 24 minutes.
Average speeds, the AA reported, were down to 5mph.
At the site, the caravan could be seen upturned in a hedge bottom.
Behind it appeared to be an upturned car as well.
An ambulance was later seen heading south on the A1.
However, as yet there are no reports as to how serious any injuries may be.
This latest incident adds to a recent spate of accidents on the A1 between Grantham and Stamford.
They all caused a series of delays.