to bunch up
01
集まる, 束になる
form into a bunch
02
密集する, 群がる
to become congested or gather closely together, often referring to traffic or crowds becoming tightly packed or slowed down
例
The cars bunched up near the exit, causing a major traffic jam.
車が出口付近に集まり、大渋滞を引き起こしました。
The traffic bunched up on the freeway due to an accident ahead.
前の事故のために高速道路で交通が渋滞した。
