{"@context":"https://schema.org","@type":"DefinedTerm","name":"Jackknife Accident","description":"A jackknife accident occurs when a tractor-trailer folds sharply on itself so that cab and trailer form an acute angle, resembling an open pocketknife. The typical trigger is sudden braking on a low-grip surface, aquaplaning, or excessive speed through a curve: the tractor's drive wheels lock or lose traction while the heavier trailer continues forward, pushing the tractor's rear sideways. The combination becomes uncontrollable within fractions of a second, liable to sweep into oncoming lanes or","inDefinedTermSet":{"@type":"DefinedTermSet","name":"Frachtportal Logistics Glossary","url":"https://www.freight-academy.com/en/glossary"},"url":"https://www.freight-academy.com/en/glossary/jackknife-accident","inLanguage":"en","dateModified":"2026-06-25T11:45:38.439828","citation":"https://en.wikipedia.org/wiki/Jackknifing","markdownMirror":"https://www.freight-academy.com/api/md/glossary/en/jackknife-accident","provider":{"@type":"Organization","name":"Frachtportal","url":"https://www.freight-academy.com"},"quickSummary":"Jackknife Accident · A jackknife accident occurs when a tractor-trailer folds sharply on itself so that cab and trailer form an acute angle, resembling an open pocketknife. · Quelle: https://en.wikipedia.org/wiki/Jackknifing"}