
He said an additional Bt2 billion is needed for operations and maintenance on the 32-kilometre eastern route, for which terms of reference are being prepared.
The operation-and-maintenance system should be in place by mid-2018 and the highway extension open by 2020, Thanin said.
Bidding for the construction of two more routes – Bang Yai-Kanchanaburi and Bang Pa-in-Nakhon Ratchasima – would take place early next year, he said.
The Cabinet approved the two projects early this month and financing methods will be considered next month.