TRB’s National Cooperative Highway Research Program (NCHRP) Research Results Digest 300: Outcomes of the Environmental Streamlining Pilot Projects describes the analysis of 10 environmental streamlining projects and suggests a “toolbox” of best practices for reducing the time associated with highway-project environmental reviews and approvals. The digest discusses the main points presented in the final report for NCHRP Project 25-24, “Monitoring, Analyzing, and Reporting on the Environmental Streamlining Pilot Projects,” published as NCHRP Web-Only Document 79.