Double-Decked Bus : A bus that has two levels of seating and a passenger seating capacity of 40 to 80 persons; the total bus height may be 4.4 to 5.4m(14.5to18ft.)
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}