Roads are still the dominant domestic mode of transport infrastructure in all GMS countries. Thailand
possesses the most developed road network and facilities with China. The new national airport,
Suvarnabhumi, and modern seaports, such as Laem Chabang, support the movement of international
freight. Myanmar, Lao PDR and Cambodia, on the other hand, are comparatively less developed. Even
though the various GMS Economic Corridors in Lao PDR are physically complete, supporting logistics
and border crossing facilities are still limited. Viet Nam’s infrastructure has been improved to cope with
the new trade flow but maintenance issues will become critical in the near future.