Both lanes are currently closed on a stretch of the A1 northbound after a crash.
It happened at J38 near Doncaster, between A638 and A639, this morning (Tuesday, May 28), say Highways England.
Heavy delays are expected- up to 40 minutes. It is not yet known how many vehicles are involved or if anyone has been hurt.
Highways England say traffic is not expected to return to normal until 10am.
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