Designation:E2667−09StandardPracticeforAcquiringIntersectionTurningMovementTrafficData1ThisstandardisissuedunderthefixeddesignationE2667;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeforintersectionturningmovementdataacquisitionwasdevelopedtoimproveitsqualitybyspecifyingthedataitemstobecollectedandaprocedurefordocumentingtheresults.Suchapracticewillprovidetheabilitytocomparethesedataovertimewithingovernmentalagenciesandamongdifferentgovernmentalagencies.Whiletherearenationalandinternationalstandardsforroadsegmenttrafficdata,thereisnotapracticeforintersectionturningmovementdataacquisi-tion.1.2Units—Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E2300SpecificationforHighwayTrafficMonitoringDe-vicesE2532TestMethodsforEvaluatingPerformanceofHigh-wayTrafficMonitoringDevices3.Terminology3.1Definitions:3.1.1basedataintegrity,n—retentionoforiginalcollecteddatainuncorruptedform.3.1.2truthindata,n—descriptionofhowdataarecollected,summarized,reportedandretainedsopotentialdatauserscanrecalculatesummarystatisticsfromtheoriginalcollecteddata.3.1.3vehiclecount(volume),n—totalnumberofvehiclesobservedorpredictedtopassapointonalaneorroadwayduringaspecifiedtimeinterval(seeSpecificationE2300andPracticeE2532).3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1adaptivecontrol,n—atrafficsignalcontrollerthatcontinuouslychangesthetimingofsignalp...
