Shuttle Loop (SLT) : An automated guideway transit system in which vehicles (operating separately or in trains) operate along a fixed shuttle or loop guideways with few or no switches and that usually has on-line stations
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}