將軍澳新市鎮
Tseung Kwan O Tunnel () is a 900-metre tunnel beneath Ma Yau Tong in Hong Kong. The tunnel was opened on 9 November 1990. Part of Route 7, it links Sau Mau Ping, Kwun Tong, Kowloon and the Tseung Kwan O New Town, Sai Kung District, the New Territories. It was used by 80,385 vehicles daily in 2011.