A HGV has caught fire at Scotch Corner on the roundabout.
Photos and videos on social media show the vehicle well alight with flames coming from the cab.
Eye witnesses say the driver managed to get out of the vehicle unharmed.
National Highways say the A1(M) northbound exit slip road will be closed for several hours.
There is also no access to the A66 westbound.
A spokesperson for North Yorkshire Police said: “We’re at the scene of a lorry on fire at the A1/A66 roundabout, Scotch Corner. We’re working with Fire & Rescue Service colleagues to keep everyone safe.”
There is also no access to the #A66 westbound from the roundabout.
Further details to follow. pic.twitter.com/ZVxAkLNCcV
— National Highways: Yorkshire (@HighwaysYORKS) April 5, 2023