九号干线长沙湾至沙田段全长5.6公里，预计建成后可大大纾缓狮子山隧道、大老山隧道及大埔道的交通挤塞情况。

• Route 9 (section between Cheung Sha Wan and Sha Tin) will be a new 5.6-kilometre highway running from Sha Tin to West Kowloon. It will significantly alleviate traffic congestion at the Lion Rock Tunnel,Tate's Cairn Tunnel and Tai Po Road.