大欖隧道
Before Tai Lam Tunnel was opened, the Castle Peak Road and Tuen Mun Road forms the arteries of traffic with urban Kowloon. If the two roads are closed due to accidents or any other reason, it would affect the traffic of Yuen Long. The Tai Lam Tunnel, Tuen Ma line and the Light Rail Transit (LRT) provide alternative routes to residents of Yuen Long. Some bus routes connected urban area and Yuen Long New Town together by New Territories East highway networks before Tai Lam Tunnel opened.