Wheel 2 : 1) The flanged rolling element which carries the weight and provides guidance for rail vehicles; and 2) To run a locomotive at or above speed limits
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}