noun
holiday travel rush; homecoming traffic congestion
Refers to the heavy traffic and crowded trains during major holiday periods (especially New Year's and Obon) when many people return to their hometowns.
年末の帰省ラッシュを避けて、早めに故郷へ向かった。
I left for my hometown early to avoid the year-end holiday travel rush.
帰省ラッシュ
The peak of the Obon homecoming rush starts a few days before the holiday.