An air ambulance was scrambled to a serious crash between St Albans and Redbourn today (Good Friday, April 15).
The Magpas Air Ambulance, based in Cambridgeshire, arrived at the incident on the A5183 Redbourn Road at around 3.15pm, according to FlightRadar24.
Hertfordshire Police were also called to the scene at around 2.30pm.
The road was closed throughout the afternoon, and the blockage is likely to remain in place into the evening.
A police spokesperson previously said: "The road is effectively blocked in both directions.
"The closure is likely to remain in place for some time."
The Magpas Air Ambulance flew back to its base near Huntingdon at around 3.45pm.
For the most up-to-date information about the county's roads, visit our LIVE Hertfordshire traffic map.
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Do you have a live or breaking news story from across Hertfordshire? Email: hertslivenews@archant.co.uk
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