Phase 2 was opened in 1981 ; the remaining Tuen Mun Bound carriageway was completed in 1983 .
2 consists of the Tuen Mun bound carriageway between Sham Tseng and Tsuen Wan .
Phase 2 , which consists of the Tuen Mun bound carriageway between Sham Tseng and Tsuen Wan , was opened in 1981 ; the remaining Tuen Mun Bound carriageway was completed in 1983 .