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| CH. Karnchang Public Company Ltd. |
ITALIAN-THAI Development Public Company Ltd.
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Department of Highways
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Department of Rural Roads
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| Bangkok Expressway Public Company Ltd. |
Electricity Generating Authority of Thailand (EGAT) |
Department of Groundwater Resources |
Airport of Thailand (AOT) |
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| Royal Irrigation Department |
Bangkok Metropolitan Administration |
Metropolitan Waterworks Authority (Thailand) |
Expressway Authority of Thailand |
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Department of Public Works and Town & Country Planning
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State Railway of Thailand |
Office of Transport and Traffic Policy and Planning (OTP) |
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