ASTM E2341/E2341M-2005(2009) 在交通事故地点通过启动速度和制动距离测定制动距离数值的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingtheStoppingDistanceNumberbyInitialSpeedandStoppingDistanceatTrafficIncidentSites
【原文标准名称】:在交通事故地点通过启动速度和制动距离测定制动距离数值的标准试验方法
【标准号】:ASTME2341/E2341M-2005(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E17.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:stoppingdistancenumber;Speedanddistance;Stoppingdistance;Stoppingdistancenumber(SDN);Trafficincidentsites
【摘要】:TheSDNdeterminedbythismethodrepresentsanaverageovertheintervalfromthebeginningofbrakeapplicationtotherestposition.ItmaybeareasonableestimateoftheSDNduringoneormoreportionsofthespecifiedtrafficincidentifthetestconditionsandtheincidentconditionsaresufficientlysimilar.SincethisstandarddeterminesanaverageSDNfromtheinitialspeedtorest,careshouldbeexercisedinanyapplicationofthetestresultstoaportionoftheincidentthatdoesnotendwiththespecifiedtrafficincidentvehicleatrest.TheuncertaintyoftheSDNdeterminedbythismethodcanbeevaluatedbyproceduresshowninthismethod.TherelationshipbetweentheSDNofthistestmethodandtheSDNofaspecifiedtrafficincidentisbeyondthescopeofthismethod.ThesimilaritybetweentestandspecifiedtrafficincidentSDNx2019;sdependsonthesimilarityofvehicles,vehicleballastconditions,vehicleweighttransferduringbraking,vehicletires,pavementsurface,pavementsurfacecontamination,andvehiclespeedduringaparticularphaseoftheincidentsequence.TheSDNdeterminedbythismethoddoesnotnecessarilyagreeorcorrelatedirectlywithothermethodsofskidresistancemeasurements,suchasTestMethodE274.Thistestmethodissuitableforthosesituationswhereadequatesimilaritycanbeshown.Whenitisknownthataparticularwheelbrakewasnotfunctionalduringtheincident,themethodprovidesforonlythedesiredwheelstobebrakedonthetestvehicletoduplicatethespecifiedtrafficincidentvehicle.1.1Thistestmethodcoversdeterminationofanaveragestoppingdistancenumber(SDN)undertheconditionsthatthismethodwasexecuted.Theexperimentalconditionsaregenerallyintendedtobesimilartothoseofaspecifiedtrafficincident.Thedatafromthismethodisnotcomparabletomeasureddistancesofaspecifiedtrafficincidentvehiclethatcannotbeshowntohavecontinuous,fullapplicationofitsbrakingsystem.1.2ThistestmethoddeterminestheSDNfromthemeasuredstoppingdistanceandinitialspeedwhenthewheelsonspecifiedaxlesarebrakedinthesamemannerasthespecifiedtrafficincidentvehicle.Theevaluationvehiclex2019;sbrakingsystemisrequiredtoduplicatethespecifiedincidentvehicleforbothtype(conventional,partialABS,orfullABS)andfunctionality(allbrakesfunctionalornot).1.3Themethoddocumentsthetestconditionsasabasisforevaluatingtheirsimilaritytoconditionsofaspecifiedtrafficincident.1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetest,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecification.1.5Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:R81
【国际标准分类号】:03_220_20
【页数】:5P.;A4
【正文语种】:英语