noun
Used for buildings, roads, and other structures that are currently being built. Often seen on signs or in announcements.
See also: 建築中
このビルはまだ建設中です。
This building is still under construction.
建設中の道路には近づかないでください。
Please do not approach the road under construction.
Compound of 建設 (construction) + 中 (in the middle of).