1People or vehicles passing along a road — used in contexts like road closures ("通行止め") or one-way traffic ("一方通行").
台風のため、この橋は現在通行できません。
Due to the typhoon, this bridge is currently closed to traffic.
この通りは一方通行なので注意してください。
Please be careful, as this street is one-way.
工事期間中は歩行者の通行に気をつけてください。
Please watch out for pedestrian traffic during the construction period.
大雪で高速道路の通行が規制された。
Due to heavy snow, traffic on the expressway was restricted.
2An idea or expression being widely accepted and used in society — a somewhat formal, written-style usage.
その俗説は長年、世間に通行してきた。
That popular belief has been widely accepted in society for many years.
昔の慣習が今も一部の地域で通行している。
Old customs are still commonly practiced in some regions today.