This report describes and assesses incentive programs to reduce emissions from off-road diesel engines used in the construction industry and port sector. The report focuses primarily on grant programs, tax incentives, modified contracting procedures, and non-monetary incentives implemented at the federal, state, regional, and local level. For this report we reviewed incentive program information from public agencies, interviewed public and private sector stakeholders, and reviewed other related literature. This report was prepared for the U.S. Environmental Protection Agencys (EPA) Sector Strategies Program, which works with specific industry sectors (including ports and construction) to address the most significant impediments to better environmental performance in each sector. The report is intended to help the port and construction sectors overcome regulatory, economic, and other barriers that impede the adoption of cleaner off-road diesel technologies. This report will also inform the efforts of the Clean Diesel and Retrofit Workgroup, which is a part of the Mobile Sources Technical Review Subcommittee of the Clean Air Act Advisory Committee, a federal advisory committee that provides advice to EPA on air pollution issues. The Retrofit Workgroup is developing recommendations on incentives that could be pursued at the federal level to expand EPAs current voluntary diesel reduction programs to include other industry sectors, and it has identified the port and construction sectors as good candidates for participation in EPAs voluntary programs.