A national association headquartered in Washington, D.C. made up of individual railroad members of the United States, Canada, and Mexico, which performs a variety of technical services to the railroads
Ilan Kelman (ed.), Vulnerability and Resilience Definitions and References, Version 2, 2007. http://www.islandvulnerability.org/docs/vulnres.pd f, (Vulnr and Resilience - Brit) {524}