Joint Operations : Rail operations conducted on a track used jointly or in common by two or more railroads, or operation of a train, locomotive, car or other on track equipment by one railroad over the track of another railroad
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}