noun
major traffic jam; huge congestion; complete gridlock
Describes a very severe traffic jam, often on highways or major roads, where movement is nearly impossible.
連休の初日、高速道路は大渋滞だった。
On the first day of the long holiday, the expressway was completely gridlocked.
事故の影響で都心は大渋滞に巻き込まれた。
Due to an accident, the city center was caught in a massive traffic jam.