The 1550-meter Harbor Tunnel connects to the southern tip of the island, farther away from the city center. Crossing under Kaohsiung Harbor, the tunnel was opened amidst considerable fanfare in 1984.
過港隧道則在島的另一端，離市中心較遠，全長一千五百五十公尺，橫越整個高雄港，民國七十三年完工時轟動一時。