A two vehicle smash on the A41 caused a headache for motorists during the evening rush hour last night.
A silver Ford Fiesta collided with a green Citroen C5 on the northbound stretch of the road near Hemel Hempstead, and was left facing sideways across lane one.
The incident happened at around 4.50pm, but the vehicles were not recovered until more than an hour later.
Police closed the lane due to a diesel spillage and it remained shut until around 8.30pm, causing heavy congestion for commuters.
It is believed the drivers suffered minor injuries.