Tai Lam Tunnel, running along Tsing Long Highway, is part of Route 3 Country Park Section (R3CPS) and is a transport link between the western New Territories in Ting Kau and Yuen Long.

Tsing Long Highway is a motorway of Route 3 from North West Tsing Yi Interchange on Tsing Yi Island to Yuen Long, in Hong Kong. Ting Kau Bridge and Tai Lam Tunnel are part of the motorway. It connects with Cheung Tsing Highway and Lantau Link at its southern end, and San Tin Highway and Yuen Long Highway at its northern end. Its speed limit at parts south of Tai Lam Tunnel and Tai Lam Tunnel is 80 km/h (50 mph) and parts north of Tai Lam Tunnel is 100 km/h (62 mph).