There were major delays on the A1(M) this morning after a police incident at Welwyn Garden City.
The motorway was shut in both directions between Junction 4 for Hatfield and Junction 6 Welwyn, and it has since reopened.
A severe build-up of traffic backed up as far as Stevenage, and those travelling on the northbound carriageway between Junction 3 St Albans/South Hatfield and Junction 4 also experienced delays.
Crews from the police, fire and ambulance services were on scene. Herts police confirmed that the incident regarded a concern for welfare, which was "brought to a safe conclusion."
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