Route 10 is the newest trunk route in the Hong Kong Strategic Route and Exit Number System. It is a 10.9 km dual carriageway with three lanes in each direction, consisting of the Kong Sham Western Highway (formerly Deep Bay Link) and the Hong Kong-Shenzhen Western Corridor, connecting the Yuen Long Highway (Route 9) in Lam Tei to the Shenzhen Bay Port. The trunk route is the only one in Hong Kong that terminates at a border crossing (and is partly built within the area of Shenzhen Municipality).