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noun ADJ. long, severe VERB + TRAFFIC JAM be/get caught/stuck in, sit in Our coach was caught in a traffic jam and got to Heathrow forty minutes late. PREP. ~ on the … Police report severe traffic jams on the M25, with five-mile tailbacks in places.
Oxford Collocations Dictionary
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general::
Phrase(s): a traffic jam
vehicle traffic that is so heavy and slow that it can no longer move. • Going to the airport, we got stuck in a traffic jam for nearly and hour and missed our plane.
McGrawhill's American Idioms And Phrasal Verbs