This summary report describes four case studies of rail line abandonment in Washington. These case studies were used to test a conceptual approach to predicting the location and magnitude of road damage caused by rail line abandonment. The procedure developed in the study worked well, especially as modified in the report to include District personnel in the analysis of potential road impacts. Proactive use of this procedure is dependent on continual monitoring of potential rail line abandonment candidates. Similar procedures should be developed to predict impacts on energy, environment, safety, and economic development.