An adverbial phrase meaning "as always" or "as usual," indicating that something is the same as it normally is.
朝はいつも通りコーヒーを飲んだ。
In the morning I drank coffee as usual.
今日はいつも通り電車が混んでいた。
The train was crowded today as usual.
彼はいつも通り遅刻してきた。
He arrived late, as always.