開通

1. Origins, structure, and basic meaning

• Structure: 開通 is read as かいつう and means “opening” and “resumption of service”.
• Basic usage: It describes a new bridge opening and a snow-blocked road reopening to traffic.

2. Common pitfalls and similar expressions

• Key distinction: 開通する
  • A new facility opens for the first time, whereas a blocked route reopens. In both cases the route itself is the subject of 開通する.