西區海底隧道
In June 1992, The Autopass Co. Ltd. introduced the electronic toll collection system (ETC) to Hong Kong and conduct the first testing phase at The Aberdeen Tunnel. In August 1993, ETC system was installed at a few more crowded tunnels, including Cross-Harbour Tunnel, Eastern Harbour Crossing and Lion Rock Tunnel. The system further applied to Western Harbour Crossing in May 1997, Tai Lam Tunnel in June 1998 and Cheung Tsing tunnel in July 1998.