The contract involves the construction of a 300m long section of twin-box tunnel under the seabed of Causeway Bay Typhoon Shelter and a 150m long slip-road tunnel beneath the existing Victoria Park Road and the northern part of Victoria Park, the department stated.

Director of highways Lau Ka-keung said this was the final contract for tunnel construction under the project. "With the commissioning of the project, the travelling time between central and the Island Eastern Corridor at North Point via the bypass will take only five minutes," said Lau. "It will relieve the traffic congestion along Connaught Road Central, Harcourt Road and Gloucester Road."

The overall project is a 4.5km dual three-lane carriageway with a 3.7km tunnel connecting Central to the corridor at North Point via Wan Chai and Causeway Bay. Construction works for the project started in 2009 and are expected to be completed in 2017.