The new high speed line, that will stretch on 220 km, will connect Don Mueang (domestic and Asian region), Suvarnabhumi (international) and U-Tapao (future main airport of Pattaya area) Airports. This network will be the main infrastructure backbone of the Eastern Economic Corridor Development Plan. The overall project including TOD (Transit Oriented Development) around the new rail line is estimated at 6.5 Billion Euros.
The high-speed railway crossing between Don Mueang–Suvarnabhumi–U-Tapao Airports, officially known as the High-Speed Rail Linking Three Airports Project is the second high-speed rail line project in Thailand, between the three major airports. The existing airport rail link between Bangkok city center and International airport of Suvarnabhumi, in operation since 2010, will be merged to the project as part of the City Line. The line is mainly elevated, on a 20m high double track viaduct; the track will be ballast-less and designed for a maximum operation speed of 250 km/h.
In April 2020, Egis within the consortium of Thai and Korean engineering companies, signed the contract for “Construction Supervision Consultants for High-Speed Rail Linking 3 Airport Project”. Egis team with members of 14 specialists and engineers will be undertaking part of the M&E systems engineering team within the consortium in design review, maintenance and operation. Egis’ missions will be more precisely related to quality, risk management, train operation, system assurance, depot and interface management.