A "serious" crash on the A1 (M) last night (December 26) led to a lengthy road closure.
The smash was first reported by National Highways at 11.12pm and saw the motorway closed southbound between junctions 1 for the M1 and 3 for St Albans and Hatfield.
An hour later, a Herts Police spokesperson said: "The A1(M) is closed southbound between junction 3 (St Albans/Hatfield) and Junction 1 (M25) following a serious road traffic collision late this evening.
"It is likely to be closed all night.
"Drivers, please find alternative routes."
Barrier repairs completed and all lanes reopened on the #A1M southbound between J2 (#Hatfield) and J1 (#M25).
Traffic is running smoothly through the area. pic.twitter.com/VKci4PvC99— National Highways: East (@HighwaysEAST) December 27, 2025
The road reopened shortly before 5am, however one lane remained closed for a few more hours as barrier repairs were carried out.
Shortly before 9am, National Highways confirmed that these repairs were complete and that "traffic is running smoothly through the area".
Herts Police have been contacted for more information.
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