EN 15746-4:2020

1.1GeneralThis document specifies the technical requirements to minimize the specific railway hazards of self-propelled road-rail machines - henceforward referred to as machines - and associated equipment, intended for use on urban rail. These hazards can arise during the commissioning, the operation and the maintenance of machines when carried out in accordance with the specification given by the manufacturer or his authorized representative. Where a machine is designed and intended for use on mainline and urban rail, the machine will comply with the most onerous conditions of FprEN 15746-1 and FprEN 15746-4. In all cases the machine will comply with the requirements set out in FprEN 15746-2.The requirements in this document amend those in FprEN 15746-1 as required for the use of the machine on urban railways.This document does not apply to the following:-the requirements for quality of the work or performance of the machine;-the specific requirements established by the machine operator for the use of machines, which will be the subject of negotiation between the manufacturer and the Urban Rail Manager;-moving and working while not on rails;-separate machines temporarily mounted on machines and associated equipment.This document does not establish the additional requirements for the following:-operation subject to special rules, e.g. potentially explosive atmospheres;-hazards due to natural causes, e.g. earthquake, lightning, flooding;-working methods;-operation in severe working conditions requiring special measures, e.g. extreme environmental conditions such as: freezing temperatures, high temperatures, corrosive environments, tropical environments, contaminating environments, strong magnetic fields;-hazards occurring when used to handle suspended loads which may swing freely.For a road-rail machine it is assumed that an EU road permissible host vehicle will offer an accepted safety level for its designed basic functions before conversion. Unless explicitly stated otherwise in a particular clause this specific aspect is not dealt with in this European Standard.Other track construction and maintenance machines used on railway tracks are dealt with in other European Standards, see Annex B.1.2Scope of urban railUrban rail systems cover Urban Guided Transport systems (UGT) and might include other rail systems excluded from the scope of the Interoperability Directive 2008/57/EC (Article 1.3 (a) and (b)).Urban Guided Transport systems (UGT), which cover metro, tram and light rail, are defined as public transport systems permanently guided at least by one rail, intended for the operation of local, urban and suburban passenger services with self-propelled vehicles and operated either segregated or not from general road and pedestrian traffic.Categories of urban rail systems include:-(I) Metros: UGT systems operated on their own right of way and segregated from general road and pedestrian traffic. They are consequently designed for operations in tunnel, viaducts or on surface level but with physical separation in such a way that inadvertent access is not possible. In different parts of the world, Metro systems are also known as the underground, the subway or the tube. Rail systems with specific construction issues operating on a segregated guideway (e.g. monorail, rack railways) are also treated as Metros as long as they are designated as part of the urban public transport network.-(II) Trams: UGT systems not segregated from general road and pedestrian traffic, which share their right of way with general road and/or pedestrian traffic and are therefore embedded in their relevant national road traffic legislation (highway codes and specific adaptations).(...)