Question 1

What is the Central - Wan Chai Bypass and Island Eastern Corridor Link (CWB)?

The CWB is a new strategic trunk road running along the northern shore of Hong Kong Island. It will be a 4.5 km long dual three lane trunk road consisting of a length of 3.7 km tunnel from Central Rumsey Street Flyover, extending to the vicinity of City Garden at North Point, and finally connecting to the Island Eastern Corridor. 

Upon completion of the CWB, it will only take about 5 minutes to travel between Central and Island Eastern Corridor at North Point. Linkage between the east of Hong Kong Island and other districts in the North-west of New Territories such as Tuen Mun or Hong Kong International Airport, will be more direct without passing through the busy districts of Causeway Bay, Wan Chai and Central. 

The CWB will link up the reclamation area of Central and Wan Chai, running through the sea-bed of Causeway Bay Typhoon Shelter (CBTS). The proposed scheme of the CWB is widely supported by the public, as the tunnel option can facilitate the harbour front enhancement programme and allow the public to enjoy the valuable waterfront area. 

Construction works of the CWB commenced in end 2009.

Question 2

Why we need the CWB?

The existing Connaught Road Central/ Harcourt Road/ Gloucester Road corridor is heavily trafficked, the traffic congestion not only occurs in peak hours, but also in most of the time. Any traffic accident on the corridor will result in rapid deterioration of traffic conditions and even complete blockage of roads.
Traffic from the northern shore of Hong Kong Island currently must use the above corridor, the CWB can thus divert the traffic from the commercial centre. The CWB will serve to relieve the existing traffic congestion and to cater for the anticipated traffic growth upon its commissioning.

Question 3

Will there be traffic congestion during the construction of the CWB?

Construction traffic impact assessment (CTIA) study has been carried out during the detailed design stage. During the construction period, apart from compliance with recommendations in the CTIA, the contractors will also be required to submit the proposed temporary traffic diversions to the relevant authorities (including Transport Department and Hong Kong Police Force) for approval before implementation, and for major ones, to consult district councils as well for support.

Question 4

What will be the temporary traffic diversion in the Island Eastern Corridor during the construction period of the project?

In order to give room for the tunnel construction and to merge with the tunnel alignment, the existing Island Eastern Corridor (from Hing Fat Street to Provident Centre) will be demolished and reconstructed in stages. The existing traffic capacity of Island Eastern Corridor will be maintained as far as practicable. Traffic during construction will be diverted in stages using new or temporary bridges, which will be provided along with appropriate traffic signs to notify road drivers.

The reconstruction of the above section of the existing Island Eastern Corridor was commenced by end 2012 and would be continued till the CWB’s commissioning.

Question 5

What will be the temporary traffic diversion in Central during the construction period of the project?

Construction works at Central mainly consist of the construction of tunnel, portal, approach road and slip roads from Rumsey Street Flyover to west of Man Yiu Street. To meet project needs, Man Po Street, Man Yiu Street and Financial Street will be diverted in phases. Vehicular access to/from IFCII, MTR Hong Kong Station, IFC arcades and the Four Seasons Hotel will be maintained during the construction period, along with temporary signs to notify motorists. The works commenced in Sept 2010 for completion in mid 2016. Moreover, the layout of the existing bus terminus to the west of Man Yiu Street has been modified to spare temporary works area (about 15m width) at its south end necessary for construction of the CWB tunnel structure.

Question 6

What will be the environmental impacts brought about by the CWB Project and whether appropriate environmental mitigation measures will be implemented?

Environmental Impact Assessment (EIA) under the "Environmental Impact Assessment Ordinance" was carried out and submitted to the Director of Environmental Protection on 31 October 2007. Environmental Advisory Committee conditionally endorsed the EIA Report on 14 February 2008. The EIA Report was approved by Director of Environmental Protection under the EIA Ordinance on 11 December 2008. A detailed assessment of the Project including the temporary reclamation has been shown on the report, including the environmental impact of air quality, noise, water quality, waste management, land contamination and so on. The Report concluded that, with implementation of the recommended mitigation measures in the course of construction and operation stages, the environmental impacts due to the construction works will be acceptable. Mitigation measures including the use of low-noise devices, mobile / temporary noise barriers to reduce the construction noise impact, dust-reducing measures under "Air Pollution Control (Construction Dust) Regulation", installation of silt screens and silt curtains in appropriate dredging area and selected seawater intake, and so on.

Question 7

What will be the design of the noise barrier? What will be the green measures to improve the landscape?

There are noise barriers in forms of vertical barriers and cantilevered barriers. There are also noise semi-enclosures with arched top. Vertical greening will be installed at the bottom of the vertical face of noise barriers / semi-enclosures, shrubs / evergreen plants will also be planted outside the noise barriers / semi-enclosures to improve the landscape. Roof greening with skylight will also be provided for the part of the noise semi-enclosures east of the landscape deck. We understand the community concern about the appearance of noise barriers. 

We have made reference to the design concept of the winning entries of the international open design competition of noise barriers / enclosures conducted in January 2009 into the noise barriers / semi-enclosures design in the CWB Project. Public consultations were conducted between 2011 and 2012 to collect views from the public. The project team has also consulted the Harbourfront Commission, Eastern District Council as well as nearby residents and business operators regarding the detailed aesthetic design.

Question 8

Is there any access to the CWB except the tunnel portals?

Four slip roads are constructed under the CWB project. The motorists can enter / exit the CWB through the three slip roads located near Hong Kong Convention and Exhibition Centre or enter the westbound of the CWB via Tsing Fung Street Entrance.

Question 9

Is there any toll for passing through the CWB tunnel?

No. The CWB tunnel is free for public use. 

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Last review date:18 Jul 2022