The new TE32/CR1 Changi Terminal 5 interchange will connect the airport terminal directly to the city centre and other major hubs.
LTA has called a tender to appoint a contractor for the addition and alteration works, which are expected to begin in 2025.
Aecom Singapore has a strong track record and has helped to design the Circle Line, Downtown Line, Thomson-East Coast Line and the Tuas West Extension.
A project to extend the Thomson-East Coast Line north into Johor Bahru is gaining traction, with the second phase of an advanced engineering study under way.
From now until the end of the month, the public can vote for the names of 10 MRT stations to be built in the eastern part of Singapore.
A new addition to Singapore's rail network was announced yesterday - the Thomson-East Coast Line - a 13km, nine-station line tracing the east coast shoreline.