The transportation infrastructure along the North-South economic balcony (North-South Economic Corridor: NSEC) is one of the planned economic cooperation development of the GMS to link Thailand – Burma-Laos-China sapop. road R3, which is divided into two paths is a route linking Chiang R3A – Luang Nam tha-Jinghong-Kunming, which is the construction of a bridge over the Mekong River, 4 (Chiang Khong-houei Sai) by starting the construction of the year 2552 and 2554 expected completion year, and roads linking between Mae Sai R3B – Kengtung-Jinghong-Kunming.
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