The document summarizes work done by the OECD on infrastructure investment in the G20. It discusses the OECD's past contributions, current work, and areas of potential future focus. The OECD has delivered guidance and frameworks to the G20 on improving infrastructure governance and financing. Current work includes addressing data gaps through the Infrastructure Data Initiative. Looking ahead, the OECD will focus on developing quality infrastructure principles and convening international partners to coordinate efforts.