獅子山隧道
Traffic then crosses the Cross-Harbour Tunnel into Kowloon and keeps heading north along Princess Margaret Road and Waterloo Road. The stretch of Waterloo Road between Hereford Road and Lancashire Road in Kowloon Tong is the only section of the route that is not controlled access. Traffic then climbs a steep incline to reach the Lion Rock Tunnel. At the end of the tunnel, the road skirts the border of Tai Wai. The route becomes an expressway in Sha Tin for the remaining 3 km. Traffic has an option to merge to Route 9 in Sha Tin or branch off onto Route 2 for Ma On Shan.