Physical Maintenance : The preservation and upkeep of a highway, including all of its elements, in as nearly as practicable its original as constructed condition or its subsequently improved condition,
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}