Designation:E1656/E1656M−11(Reapproved2016)StandardGuideforClassificationofAutomatedPavementConditionSurveyEquipment1ThisstandardisissuedunderthefixeddesignationE1656/E1656M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoversinformationforclassifyingthemea-surementcapabilityofpavementconditionsurveyequipmentorinstrumentationthatmeasureslongitudinalprofile,trans-verseprofileorcrackingofpavementsurfaceswhileoperatingatorneartrafficspeeds.1.2Themeasuringequipmentorinstrumentation,addressedbytheguide,samplesandstoresmeasurementdatawhileoperatingatorneartrafficspeeds.1.3Thisguidedoesnotaddressequipmentthatoperatesattrafficspeedsbutisincapableofmeasuringprofileorindi-vidualcrackcharacteristics,suchasresponse-typeroughnessmeasuringsystemsandsemi-automateddistressrecordingsystems.1.4Thisguideprovidesmeasurementcriteriaandclassifi-cationforuseinarangeofapplications.1.5Themeasurementcriteriaapplytolongitudinalprofile,transverseprofile,orthecrackingofpavementsurfaces.1.6Thisguidedoesnotaddresstheprocessingofmeasureddata.1.7ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E456TerminologyRelatingtoQualityandStatistics3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1characteristic,n—directlymeasurabledistinguishingpropertyofthepavementsurface.3.1.1.1...
