The Tseung Kwan O – Lam Tin Tunnel (TKO-LTT) project is a dual two-lane carriageway that stretches 3.8 km in length. The main tunnel, which runs for 2.2 km between the road interchanges at Lam Tin and Tseung Kwan O (TKO), is supplemented by a branch tunnel that provides a direct link between the westbound tunnel and the Eastern Harbour Crossing toll plaza. Additionally, the project includes the construction of an underpass, Road P2, which connects the TKO Interchange to town centre. The TKO-LTT connects further to the road network of the Cross Bay Link project, forming a comprehensive network serving the traffic between the southeastern part of the TKO and Lam Tin.