TRB’s National Cooperative Highway Research Program (NCHRP) Report 615: Evaluation of the Use and Effectiveness of Wildlife Crossings explores development of an interactive, web-based decision guide protocol for the selection, configuration, and location of wildlife crossings. The decision tool as outlined in the report can be found on the web at http://www.wildlifeandroads.org or http://environment.transportation.org/environmental_issues/wildlife_roads/decision_guide/manual.