Construction
noun, verbal noun
Construction occurrences are just construction.
工事 can refer to all kinds of construction, including the construction of roads, buildings, water and power lines, and more.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
工事は今日から明日までです。
The construction is from today to tomorrow.
この道は今工事中なので、左に行って下さい。
This road is under construction now, so please take a left.
夕べは工事の音がうるさくて、ねむれませんでした。
I couldn't sleep because of the noise of the construction last night.