ASTM_E_1656_-_E_1656M_-_11.pdf

Designation:E1656/E1656M11Standard Guide forClassification of Automated Pavement Condition SurveyEquipment1This standard is issued under the fixed designation E1656/E1656M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide covers information for classifying the mea-surement capability of pavement condition survey equipmentor instrumentation that measures longitudinal profile,trans-verse profile or cracking of pavement surfaces while operatingat or near traffic speeds.1.2 The measuring equipment or instrumentation,addressedby the guide,samples and stores measurement data whileoperating at or near traffic speeds.1.3 This guide does not address equipment that operates attraffic speeds but is incapable of measuring profile or indi-vidual crack characteristics,such as response-type roughnessmeasuring systems and semi-automated distress recordingsystems.1.4 This guide provides measurement criteria and classifi-cation for use in a range of applications.1.5 The measurement criteria apply to longitudinal profile,transverse profile,or the cracking of pavement surfaces.1.6 This guide does not address the processing of measureddata.1.7 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in nonconformancewith the standard.1.8 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E456 Terminology Relating to Quality and Statistics3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 characteristic,ndirectly measurable distinguishingproperty of the pavement surface.3.1.1.1 DiscussionExamples are pavement longitudinalprofile,transverse profile,and separations in the continuity ofa pavement surface.3.1.2 dynamic intermediate precision,nprecision of themeasurement of a characteristic determined under dynamicintermediate precision conditions in which the same equipmentmoving at operating speed measures the characteristic at thesame location repeatedly,in accordance with the procedurespecified in 7.2.3.1.3 longitudinal profile,nperpendicular deviations ofthe pavement surface from an established reference parallel tothe lane direction,usually measured in the wheel tracks.3.1.4 resolution,nsmallest increment that a characteristic-measuring process must distinguish and display.3.1.5 stationary repeatability precision,nprecision of themeasurement of a characteristic determined under repeatabilitycondition with the instrumented equipment stationary,in ac-cordance with the procedure specified in 7.1.3.1.6 tolerance,ndefined limits of allowable(acceptable)departure from the true value of a measured quantity.4.Significance and Use4.1 Highway agencies,equipment manufacturers,and otherorganizations can use this guide to classify the measuringcapabilities of pavement condition survey equipment thatoperates at traffic speeds and collect some of the data useful incharacterizing pavement conditions.1This guide is under the jurisdiction of ASTM Committee E17 on Vehicle-Pavement Systems and is the direct responsibility of Subcommittee E17.42 onPavement Management and Data Needs.Current edition approved June 1,2011.Published July 2011.Originally approvedin 1994.Last previous edition approved in 2006 as E 1656 94(2006).DOI:10.1520/E1656_E1656M-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.2 The vertical measurement resolution,sample interval,and crack width capabilities as specified in Section 5 aresubject to user verification.5.Guidelines5.1 Classification:5.1.1 Attribute Measurement Category:5.1.1.1 The measuring capability of condition survey equip-ment is described by a set of attribute measurement categories,each designating the capability of measuring an individualpavement attribute.The designated attributes covered are:(1)longitudinal profile,(2)transverse profile,and(3)crack width.5.1.2 Code:5.1.2.1 The measurement capability in each category isdesignated by the sequence of codes each representing a typeor level of measurement capability,as follows:(1)First codeMeasured attribute(alphabetic