This publication builds on the ASEAN Kuala Lumpur Strategic Plan 2016-2025 and implement its sustainable transport (ST) milestone ST-2.3 on the development of a monitoring framework and harmonised approach for indicators on energy and GHG emissions in the transport sector.While these Guidelines provide a basis by which sustainable land transport indicators can be defined and adopted by ASEAN as a region, each Member State still has the option to select the most appropriate indicators and future actions. The technical content and guidance mentioned in this document are to be considered for further development and actions by ASEAN and its Member States.