Update at 4.20pm
The A1(M) has now fully reopened following a serious crash between Ripon and Boroughbridge.
Highways England said there is four and a half miles of congestion following the closure.
https://twitter.com/HighwaysYORKS/status/1468968848095252483
Update at 2.35pmNorth Yorkshire Police has said the southbound A1(M) has finally reopened but traffic remains heavy.
https://twitter.com/NYorksPolice/status/1468950384135716865
Update at 12.40pmDrivers have been turned around on the A1(M) southbound carriageway to get them off the motorway while the emergency services deal with a serious crash between Ripon and Boroughbridge.
North Yorkshire Police said it received reports of a single vehicle crash just before 9am. The road has not yet reopened.
It is unclear at this time the extent of any injuries suffered in the crash or when the closure will be lifted.
A Thirsk resident Charles Allen told the Stray Ferret that he had been sat in traffic for more than three hours. He added:
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