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1、APTAManualofStandardsandRecommendedPracticesforRailTransitSystemsVolumeI–BackgroundandProcessVolumeII–VehicleInspectionandMaintenanceVolumeIII–RailGradeCrossingsVolumeIV–OperatingPracticesVolumeV–FixedStructureInspectionandMaintenanceVolumeVI–SignalsandCommunicationInspectionandMaintenan
2、ceCompiledunderthedirectionoftheAPTARailTransitStandardsTaskForcePublishedbytheAmericanPublicTransportationAssociation,1666KStreet,NW,Washington,DC20006-1215,USA1October2004Copyright?2004APTA.Allrightsreserved.Volume17/26/04PrefaceThisManualofStandardsandRecommendedPracticesforRailTransi
3、tSystemsisdeveloped,approvedandmaintainedbytheRailTransitStandardsTaskForceoftheAmericanPublicTransportationAssociation(APTA).APTArailtransitstandardsandrecommendedpracticesaredevelopedbythetechnicalcommitteesoftheTaskForce.WiththeexceptionofAPTAstaffadvisors,membersofthesecommitteesserv
4、evoluntarilyandwithoutcompensation.ThestandardsandrecommendedpracticesdevelopedthroughtheTaskForcerepresentaconsensusofthebroadexpertise,includingrailtransitsystems,builders,suppliers,raillabor,andgovernmentofficials,withintheindustryonthesubject.TheAmericanPublicTransportationAssociatio
5、n(APTA)developedthismanualthroughadiversegroupofexperts,arrivingatconsensuspositions,usingtheproceduresdefinedintheAPTAbylaws.APTArecognizesthatmanyoftheprovisionsofthismanualarenewandhavenotwithstoodthetestoftime.Someofthemmayleadtounanticipatedimpacts.APTAexpectsthemanualtobesubjecttoc
6、onsiderablescrutinybytherailtransitindustry.Aspartofthisscrutiny,APTAwelcomescriticism,commentsandsuggestionsintendedtoimproveclarityofthedocument,toincreaseitstechnicalaccuracyortoreduceitsimplementationcosts.APTA’smemberorganizationsandtheRailTransitStandardsTaskForcedonotassumeanyduti
7、esorresponsibilitiesofusersofthismanual.Bypublishingthemanual,APTAdoesnotinsureanyoneusingtheinformationcontainedinthemanualagainstanyliabilityresultingfromthatuse.Thestandardsandrecommendedpracticescontainedinthismanualwillbephasedinbyrailtransitsystemsoveratwo-yeartimep
