Designation:E2341/E2341M−05(Reapproved2014)StandardTestMethodforDeterminingtheStoppingDistanceNumberbyInitialSpeedandStoppingDistanceatTrafficIncidentSites1ThisstandardisissuedunderthefixeddesignationE2341/E2341M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversdeterminationofanaveragestoppingdistancenumber(SDN)undertheconditionsthatthismethodwasexecuted.Theexperimentalconditionsaregener-allyintendedtobesimilartothoseofaspecifiedtrafficincident.Thedatafromthismethodisnotcomparabletomeasureddistancesofaspecifiedtrafficincidentvehiclethatcannotbeshowntohavecontinuous,fullapplicationofitsbrakingsystem.1.2ThistestmethoddeterminestheSDNfromthemea-suredstoppingdistanceandinitialspeedwhenthewheelsonspecifiedaxlesarebrakedinthesamemannerasthespecifiedtrafficincidentvehicle.Theevaluationvehicle’sbrakingsys-temisrequiredtoduplicatethespecifiedincidentvehicleforbothtype(conventional,partialABS,orfullABS)andfunc-tionality(allbrakesfunctionalornot).1.3Themethoddocumentsthetestconditionsasabasisforevaluatingtheirsimilaritytoconditionsofaspecifiedtrafficincident.1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetest,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecification.1.5Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E178PracticeforDealingWithOutlyingObs...
