The Diesel Technology Forum launched its Clean Diesel Retrofit Tool Kit at a national conference it co-sponsored with the U.S. Environmental Protection Agency (EPA) in Washington on June 3-4. Goal of the conference was to explore opportunities to expand diesel retrofits as a cost-effective emissions reduction strategy. The tool kit, now available online at www.dieselforum.org/retrofit, is designed to provide state transportation officials and metropolitan planning organizations (MPOs) nationwide with a comprehensive guide to implementing a diesel retrofit program. Diesel retrofit programs are one of the most cost-effective air quality solutions among the transportation-related emissions reduction strategies eligible for funding under the U.S. Department of Transportation's Congestion Mitigation and Air Quality Improvement (CMAQ) Program. The Clean Diesel Retrofit Tool Kit includes case studies on successful retrofit projects; information about identifying equipment candidates; a list of EPA-approved equipment eligible for CMAQ funding; options for securing funding; how to achieve emissions credits; as well the latest retrofit-related news and links to additional resources for designing a retrofit program. The kit's online format allows it to be a constantly evolving resource, continually being updated with new content as it becomes available. Log on to www.dieselforum.org/retrofit to access the complete Diesel Technology Forum Clean Diesel Retrofit Tool Kit.