TLT is responsible for the formulation of a master plan, feasibility study and scoping of public-private partnership. The Group proposes preliminary design of main structure such as mooring basins, turning basins, navigation channels, breakwaters and many other amenities, and then generates detailed design and prepares bidding documents for the construction invested by the government.

To study and formulate a master plan for the linking of bridges across the Chao Phraya River with the road network. Providing guidelines on development of existing and to-be-constructed bridges, the plan aims to enable a systematic link between bridges and roads and to prioritize the project activities and investment in the construction. This will help integrate the missions of infrastructure development of various agencies. Also, the study result will contribute to efficiency enhancement of the existing bridges, roads and intersections as well as the refurbishment of areas beneath the bridges.

Economic, engineering and environmental preliminary studies of highway and bridge nationwide for prioritization have been implemented. The company also conducted a 10-year (2007-2016) and a five-year operation plan (2007-2011) including development of preliminary highway project feasibility analysis program.

Study, analysis and efficiency improvement of storage, mixing, distribution, selling systems of ethanol and gasohol by optimizing overall expenses in order to cut cost to increase competitiveness compared with foreign counterparts.