trees, 150,000 shrubs and 60,000 climbing plants were planted during the construction period. As to conservation of wildlife, there is a small tunnel constructed at the south portal of Tai Lam Tunnel, mainly for small wild animals in this area to commute in the valley freely, allowing them to maintain their habituation. To keep in pace with technology development, Tai Lam Tunnel has gradually replaced traditional light bulbs with light-emitting diodes (LEDs). The indicator lighting signals inside the tunnel tubes and at the toll plaza as well as the illuminating system in the administration building have thus been replaced for reducing carbon emission. See also Tai Lam Tunnel Bus Interchange References External links Route 3 (CPS) Company Limited Extra areas operated by NT taxis Pat Heung Road tunnels in Hong Kong Route 3 (Hong Kong) Ting Kau Toll tunnels in Hong Kong 1998 establishments in Hong Kong