Island Eastern Corridor
| Company type | Expressway |
|---|---|
| Industry | Transportation |
| Founded | 1981 |
| Headquarters | Hong Kong , Hong Kong |
Area served | Northeastern coast of Hong Kong Island |
| Products | Controlled-access expressway |
The Island Eastern Corridor (IEC) is a controlled-access expressway situated along the northeastern coastline of Hong Kong Island in Hong Kong. Stretching from Causeway Bay in the west to Chai Wan in the east, it constitutes the majority of Route 4. The segment between Causeway Bay and Quarry Bay predominantly features viaduct structures running adjacent to Victoria Harbour.
History
Following World War II, the Eastern District of Hong Kong Island experienced swift urban growth, which resulted in significant traffic congestion on the primary artery, King's Road.
In response, the 1968 Hong Kong Long Term Road Study recommended constructing an elevated dual carriageway above King's Road, extending eastward as a ground-level route along the shoreline between Sai Wan Ho and Chai Wan. This proposal was subsequently modified to include a waterfront viaduct parallel to King's Road. Construction was carried out in multiple phases commencing on 8 April 1981, followed by 20 May 1982, and 5 August 1986. The corridor was inaugurated in three segments: from Causeway Bay to Taikoo Shing in June 1984; from Taikoo Shing to Shau Kei Wan in July 1985; and from Shau Kei Wan to Chai Wan in October 1989.
Upgrades to the expressway have taken place over time, such as the bridge realignments at Quarry Bay, completed in 2003, which linked Route 4 with Route 2. There are ongoing proposals to extend the corridor further into the hilly areas of Chai Wan and Siu Sai Wan. Additionally, the viaduct near City Garden was expanded to serve as the eastern endpoint of the Central–Wan Chai Bypass.
In 2008, the IEC served as the venue for the Hong Kong Marathon’s 10-kilometre race. During this event, residents raised concerns about noise levels reaching up to 60 dB during early morning hours.
That same year, government plans were unveiled for a waterfront promenade spanning from Causeway Bay to Sai Wan Ho, featuring floating platforms beneath the IEC at North Point. Potential conflicts with the Protection of the Harbour Ordinance have led to further feasibility assessments. Once finalized, this project will establish an uninterrupted promenade stretching from Central to Sai Wan Ho, complementing recreational developments associated with the Central–Wan Chai Bypass.
Alignment
The corridor initiates at Causeway Bay as an elevated viaduct, connecting Victoria Park Road with Gloucester Road via an access ramp. It continues eastward along North Point’s shoreline as a viaduct until reaching Quarry Bay, where it transitions to ground level and links with the approach road of the Eastern Harbour Crossing. Beyond Taikoo Shing, the route ascends once more as a viaduct between Sai Wan Ho and Aldrich Bay, curving near the vicinity of the Hong Kong Museum of Coastal Defence. It then descends back to ground level, passing through areas such as A Kung Ngam and Heng Fa Chuen, before terminating near Chai Wan Park at a large roundabout intersecting with Chai Wan Road and Wan Tsui Road, adjacent to MTR’s Chai Wan station.
Apart from a brief stretch in Chai Wan between its eastern terminus and Wing Tai Road, the corridor is officially classified as an expressway under section 123(1) of the Road Traffic Ordinance, Cap. 374. The speed limit enforced on this expressway is set at 70 km/h.
Criticism
The corridor has drawn objections due to its occupation of prime waterfront land, which some argue could be better utilized for the benefit of Hong Kong's residents if alternative routes were considered. Local inhabitants have expressed worries about noise pollution from traffic, given the corridor's closeness to residential zones, leading to demands for the installation of noise-reduction barriers. Suggestions to substitute the Watson Road – Tin Chiu Street segment with an underground tunnel were ultimately rejected because of the significant engineering difficulties involved.