Truck shears on the A1 motorway and loses a load of stones

The text below is an AI text with some minor adjustments.
An accident occurred this morning on the A1 motorway in which a lorry was jackknifed and lost its load of stones. The accident took place near Hoevelaken and led to serious traffic disruption.
At around 11:30 am this morning, the truck rammed for unknown reasons and lost its load of stones over the highway and part of the other carriageway. This immediately created several kilometers of traffic jams in both directions and the highway was temporarily closed completely.
The emergency services were quickly on the scene and immediately took measures to limit traffic disruption. The truck is badly damaged and will have to be towed away.
Rijkswaterstaat has now started cleaning the highway and clearing the stones. This is expected to take some time and traffic will be diverted via the parallel road during this period. Road users are therefore advised to take extra travel time into account and to follow the detour signs.
It is still unknown when the highway can be fully reopened. The police are continuing to investigate the cause of the accident.