Kai Tak Tunnel

Kai Tak Tunnel, formerly known as the Airport Tunnel, is a tunnel in New Kowloon, Hong Kong, which connects the Kowloon Bay and Ma Tau Kok areas by going beneath the former Hong Kong International Airport (Kai Tak Airport). It is part of Route 5. The tunnel provides a quick link between the two ends of the tunnel, as before the construction of the tunnel vehicles had to detour through Kowloon City to reach the other end. Kai Tak Tunnel is currently managed by Greater Lucky (H.K) Company Limited.

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Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

Other tunnels in China

Delaware Aqueduct United States · 137 km Päijänne Water Tunnel Finland · 120 km Orange–Fish River Tunnel South Africa · 82.8 km Ishikawa Tunnel Japan · 78.5 km Brenner Base Tunnel Austria · 64 km Mont d'Ambin base tunnel France · 57.5 km Gotthard Base Tunnel Switzerland · 57.09 km Hong Kong–Zhuhai–Macau Bridge China · 55 km