In May 2006, the Asian Development Bank published the Greater Mekong Subregion (GMS) Transport Sector Strategy Study 2006-2015 (TSS), which proposed broad goals and strategies for GMS transport development as well as a pipeline of transport investment projects. Recently, the GMS countries saw the need to conduct a review of the TSS to assess its achievements and effectiveness. This initial review of the TSS involves the assessment of its strategic thrusts vis-à-vis the general criteria of relevance, effectiveness, efficiency, sustainability, and development impact. The initial review also includes suggested scope, approach, and requirements for a fuller review of the TSS in the near future.