"This report outlines the need to strengthen links between Southeast Asia’s economic integration agenda and its security agenda. The region is committed to rapidly developing economic connections but attention is lagging towards the security impacts that accompany these developments. Regional integration expands licit economic opportunities, but illicit markets tend to develop at the same time. Where cross-border infrastructure and trade facilitation initiatives are expanding, organised crime groups have demonstrated the capacity to seize new opportunities to expand cross-border crime. ASEAN member states have committed to expand the regional economic market through far-reaching fast moving integration. Physical and non-physical barriers are being removed to ensure more practical and efficient border crossings for people, goods and money. This process is accompanied by a number of infrastructure initiatives that will enhance connectivity between trading partners and increase access to previously remote areas. For trade and infrastructure planners, the dominant concept of border management is shifting from ‘control’ to ‘facilitation’. However, the positive effects of economic growth need to be safeguarded by making trade, migration, and sensitive areas more secure. The expected growth of cross-border trade and migration calls for novel measures to monitor and secure the people and goods moving internationally. This requires robust and streamlined procedures; law enforcement and security agencies will need to work closely with trade and infrastructure planners and developers. Currently, the ASEAN institutional agenda for countering transnational crime is not moving at the same speed as the trade and migration side of the integration agenda.1 This report provides a brief overview of economic integration and infrastructure plans and initiatives intended to connect the ASEAN region internally and with other regions, particularly neighbouring India and China. It begins by analysing relevant trade agreements and progress in expanding transport networks around the region and connections to other regions. The analysis includes observations on where the risks for negative social and environmental impacts are high. Following that, there are four sections that provide a non-exhaustive overview of sub-regions with pronounced transnational crime challenges. Recent increases in the trafficking of drugs and precursor chemicals, humans, and counterfeit goods, as well as environmental crimes, warrant special attention in managing international flows in these geographic areas. Projections of future threats underline the importance of taking action now..."