Sarawut Songsivilai said toll stations were being erected at Huei Yai, Khao Zion and U-tapao, with the last more than 60 per cent finished and due for completion by July.
Drivers of four-wheeled vehicles will be charged Bt10-Bt130, six-wheelers Bt15-Bt210 and vehicles with more than six wheels Bt20-Bt305.
The Bangkok-Ban Chang stretch of Highway 7 between Pattaya and Map Ta Phut is expected to be the main route used in developing eastern coastal areas, Sarawut said.
It will benefit businesses including tourism by connecting Laem Chabang Port with various industrial estates, increasing logistical efficiency and helping make Thailand a transportation hub for Southeast Asia, he said.