This document: - lists the formulae and the associated rules needed to calculate the infrastructure gauge; - lists the various phenomena to be taken into account to determine the infrastructure gauge; - defines a methodology that may be used to calculate the various profiles from these phenomena; - lists the rules to determine the distance between the track centres; - lists the rules to be complied with when building the platforms; - lists the rules to determine the pantograph gauge; - provides recommendations for the various profiles needed to install, verify and maintain infrastructure; and is applicable for various track gauges.