Pavement Structure : The combination of sub-base, base course, and surface course placed on a sub-grade to support the traffic load and distribute it to the roadbed
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}