The M1 southbound has been closed in Hertfordshire due to a lorry fire.
The incident took place prior to 12.58pm today (Wednesday, March 13) between junction 9 for Redbourn and junction 8 for Hemel Hempstead.
Hertfordshire police, the fire and rescue service and National Highways attended the scene, with motorists urged to avoid the area.
All but one lane have since reopened.
A spokesperson for Hertfordshire Constabulary said: "Police were called at 12.58pm today (Wednesday, March 13) to reports of a lorry on fire on the M1.
"It happened between junctions 9 and 8, southbound.
"Officers attended to assist the fire and rescue service and National Highways."
A statement released by Hertfordshire Fire and Rescue Service added: "We are currently dealing with a HGV trailer on fire on the M1 Southbound, junctions 9 to 8.
"Please expect delays to your journey and avoid if possible."
A spokesperson for Hertfordshire Fire and Rescue Service later added: "Five fire engines, from Hemel Hempstead, St Albans, Markyate and Harpenden were sent to the scene, where crews located a large lorry trailer well alight on the hard shoulder.
"The road was closed while firefighters tackled the fire and provided first aid to the driver of the vehicle.
"The fire was out by 1:45pm and the motorway was partially reopened, but crews remained at the scene until around 2:25pm to damp down the scene."
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