PT World
Elizabeth Baker
11 June 2025
Changi Airport Group (CAG) has awarded a contract for the construction of intra-terminal tunnels at Terminal 5 (T5) to a joint-venture between Penta-Ocean Construction and Koh Brothers Building & Civil Engineering Contractor. This construction, valued at S$999m (US$776m) is expected to take more than four years.
The intra-terminal tunnels will serve as underground connections within T5, supporting the efficient transfer of passengers and baggage across the terminal’s concourses, while also facilitating the routing of common utilities.
The tunnel system comprises a series of sub-tunnels that will house key infrastructure to support efficient airport operations. They include the automated people mover system and baggage handling system, as well as a common services tunnel (CST) which will contain dry and wet utilities such as electrical power, communication systems and water services. The works also comprise a ventilation building that supports the CST, and provisions for a future underground infrastructure tunnel.
