A lane is closed on the Junction 8 slip road of the M1 southbound near St Albans after a collision this morning.
Emergency services are on the scene and motorists are being advised to approach with caution.
At about 10.40am, Highways England tweeted: #M1 at southbound entry slip at J8 for #Breakspears #HemelHampstead, lane 1 is closed following a traffic collision. Traffic officers, @roadpoliceBCH and ambulance at scene dealing. Please approach with caution and observe lane closures on your approach from the #A414."
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