noun, noun or participle which takes 'suru', intransitive verb
opening; inauguration; going into service
Used for the initial opening of infrastructure such as roads, railways, bridges, tunnels, or communication lines. Often appears in news reports.
新しい高速道路が来月開通する。
The new expressway will open next month.
海
The opening ceremony for the undersea tunnel was held.
noun, noun or participle which takes 'suru', intransitive verb
reopening; resumption of service
Used when a road, railway, or service that was closed (e.g., due to disaster, construction, or accident) is reopened to traffic or use.
大雨で通行止めだった国道がようやく開通した。
The national highway that was closed due to heavy rain has finally reopened.
復旧工事が終わり、鉄道の開通が待たれる。
With restoration work finished, the resumption of railway service is awaited.