開通する 〔新線・道路などが〕be opened to [for] traffic
- 両都市間に鉄道が開通した
- Railroad service between the two cities has been started.
- 不通区間は午後9時に開通した
- The closed section was reopened to [for] traffic at 9 p.m.
- 離島と本土との電話が開通した
- Telephone communication between the remote island and the mainland is now possible.
- 開通式the opening ceremony ((of a bridge))