Welche Bedeutung steckt hinter der hier vorgestellten Vokabel aus dem Bereich In the news?

Thousands of commuters were delayed from arriving at work on time this morning when a lorry jackknifed and shed its load over the city's main access road.

The lorry jackknifed.

Do you know what it means?

• The truck crashed.
• The truck's trailer lost control and swung round at an angle to the cabin.
• The truck ran out of fuel.