The A1(M) has been shut on the northbound carriageway near Junction 4 for Hatfield. Picture: Archant (Image: Archant)
An accident on A1(M) affecting northbound and southbound traffic.
A crash has caused queuing traffic on the A1(M) from J8 A602 (Stevenage / Hitchin) to J6 B197 Welwyn By Pass Road (Welwyn / Welwyn Garden City).
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