Restraining Rail : A rail placed parallel to the inside running rail on a curve to restrain the wheel flange and reduce wear on the outside running rail
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}