The Hsuehshan Tunnel system consists of two primary tunnels, one westbound and one eastbound. Between the two primary tunnels runs a pilot tunnel four meters in diameter.
雪山隧道採用分離的雙孔設計，一孔為單向西行，一孔為單向東行，東行線和西行線的中間還有一道規模較小、直徑四公尺的導坑。