Works in Central District are undertaken by two contracts: a) Central Interchange Contract (Contract No: HY/2009/18) and b) Tunnel Buildings, Systems and Fittings, and Works Associated with Tunnel Commissioning Contract (Contract No: HY/2011/08).
A section of the tunnel structure in Central District is constructed under Central Reclamation Phase III (CRIII).
a) Central Interchange (Contract No: HY/2009/18)
This contract is for the construction of a 220-metre-long tunnel section, together with its approach road and at-grade slip road. Rumsey Street Flyover will be widened and modified.
b) Tunnel Buildings, Systems and Fittings, and Works Associated with Tunnel Commissioning (Contract No: HY/2011/08)
This contract is for the construction of the Tunnel Building in Central District, i.e. West Ventilation Building (WVB), and tunnel cladding works, installation of route-wide tunnel electrical and mechanical works as well as the traffic control and surveillance system. The contract scope also includes testing and commissioning works.