Civil Structural Health Monitoring Workshop. Berlin. Germany. 2012. Report. The LTBP program is a twenty-year research program initiated by the United States Federal Highway Administration to study several critical aspects of bridge performance. High priority performance issues have been identified with the assistance of bridge owners and other key stakeholders. A pilot program to validate inspection protocols has been completed and a unique data infrastructure to manage LTBP data has been created. Bridges to be tested will be selected using a statistically designed process and reference bridges will be selected. The long-term data collection phase of the program will be underway in late 2012.