Reducing the infrastructure gap requires improvements in efficiency and quality of public investment in infrastructure and mobilization of public and private finance. On April 16, 2016 the MDBs participated in the first Global Infrastructure Forum to discuss how they can work together to implement the infrastructure dimension of the Addis Ababa Action Agenda1 . The MDBs resolved to follow a two-pronged approach based on (i) supporting country-led approaches to planning, executing, supervising and evaluating sustainable, resilient, inclusive, and well-prioritized infrastructure programs and robust infrastructure frameworks; and (ii) consolidating and scaling up existing multilateral mechanisms to promote greater knowledge transfer, project preparation and implementation support in the form of global and regional platforms and tools, including de-risking and risk allocation mechanisms. To achieve these objectives the MDBs resolved to (1) improve data and information on infrastructure; (2) promote compatible, efficient approaches; (3) strengthen project preparations; and (4) promote financing for infrastructure. This Issue Brief summarizes the actions taken under each of these initiatives. It will provide the baseline for future monitoring. In addition, the Global Infrastructure Forum will meet annually and report on progress to UN Member States via the Financing for Development Forum.