Kumagai Gumi
Phase 1 of the Kwun Tong Bypass spans from the junction of Lei Yue Mun Road and Tseung Kwan O Road to Wai Yip Street. New Hong Kong Tunnel Company Limited was given the responsibility to undertake its construction on behalf of the government, as it was considered part of the associated works of the EHC project. Construction of this section was completed by Kumagai Gumi in September 1989, when it was opened to traffic together with the Harbour Crossing.