It happened on the southbound side of the road at the Bowes Incline after junction 66, close to the Angel of the North.
The cars involved are blocking one lane of the road.
The North East Live Traffic account tweeted: "A1 Southbound after J66 at #BowesIncline.
Most Popular
-
1
Man appears in court over the murder of Sunderland schoolgirl Nikki Allan in 1992
-
2
The 13 Sunderland streets with most disorder and anti-social behaviour in March
-
3
13 pictures as Sunderland fans celebrate promotion in the city centre
-
4
Convicted Sunderland pervert jailed after sex chat with police officer posing as 'teenage girl'
-
5
11 of YOUR pictures from home and away as Sunderland march to Wembley victory against Wycombe Wanderers
"Three vehicles are blocking a lane, expect delays."
The car has since been moved to a grass verge.