Availability, Transit System : A measure of the capability of a transit system to be used by potential patrons, such as the hours the system is in operation and/or the route spacing; (see Accessibility)
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}