CH. Karnchang Public Company Ltd.

ITALIAN-THAI Development Public Company Ltd.

Department of Highways

Department of Rural Roads

Bangkok Expressway Public Company Ltd.

Electricity Generating Authority of Thailand (EGAT)

Department of Groundwater Resources

Airport of Thailand (AOT)

Royal Irrigation Department

Bangkok Metropolitan Administration

Metropolitan Waterworks Authority (Thailand)

Expressway Authority of Thailand

Department of Public Works and Town & Country Planning

State Railway of Thailand

Office of Transport and Traffic Policy and Planning (OTP)