The tunnel route will be 13.4 km long, with the section under Ca Pass measuring 3.9 km and 500m under the Co Ma pass.
Construction is scheduled to start on 18 November 2012 and complete by 2016.
On completion, the tunnel route is expected to reduce traffic accidents on National Highway 1A and contribute to the development of big economic centres, industrial zones and tourism sites in the central region.
It will also attribute to socio-economic and political development and ensure security-defence in the Central Highlands region.
