ASTM_D_6359_-_99.pdf

Designation:D 6359 99Standard Specification forMinimum Retroreflectance of Newly Applied PavementMarking Using Portable Hand-Operated Instruments1This standard is issued under the fixed designation D 6359;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the minimum retroreflectiveproperties of newly applied horizontal pavement markingscontaining retroreflecting spheres,such as traffic stripes andsurface symbols.The geometry specified for these valuescorresponds to that of Test Method E 1710 and is the same asCEN geometry.1.2 This specification is intended to provide standards ofhorizontal pavement markings to ensure that adequate conspi-cuity for the driver at night is provided by newly appliedmarkings.This specification applies to the measurement of themarkings using portable hand-operated instruments.1.3 Newly applied pavement markings are those that havebeen applied within 14 days before testing and from which allexcess glass spheres have been removed.NOTE1Excess glass spheres contribute to erroneous readings directlyafter application and are generally not present a few days after application.They should be removed by strong brushing or by air pressure or othermethods that do not remove the spheres that are correctly embedded andin water-borne paint after film coalescing.1.4 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:D 4505 Specification for Preformed Plastic PavementMarking Tape for Extended Service Life2D 4592 Specification for Preformed Plastic PavementMarking Tape for Limited Service Life2E 284 Terminology of Appearance3E 808 Practice for Describing Retroreflection3E 1710 Test Method for Measurement of RetroreflectivePavement Marking Materials with CEN-Prescribed Geom-etry Using a Portable Retroreflectometer32.2Other Standards:CEN/EN 1436:1997 Road Equipment.Horizontal Signal-ization.Road Marking Performance for Road Users4US Mil-Std 105D Sampling Procedure and Tables for In-spection by Attributes53.Terminology3.1 The terms and definitions in Terminology E 284 andPractice E 808 are applicable to this specification.3.2 Definitions:3.2.1 coeffcient of retroreflected luminance,RL,nthe ratioof the luminance,L,of a projected surface to the normalilluminance,E,at the surface on a plane normal to theincident light,expressed in candelas per square metre per lux(cd m-2lx-1).3.2.1.1 DiscussionBecause of the low luminance of pave-ment markings,the units used commonly are millicandelas persquare metre per lux(mcd m-2lx-1)3.3 Definitions of Terms Specific to This Standard:3.3.1 acceptable quality level,AQL,nthe maximum per-cent defective that,for purposes of sampling inspection,can beconsidered satisfactory as a process average.3.3.1.1 DiscussionThis is the largest proportion of pave-ment marking readings with values below the acceptable level.3.3.2 CEN geometrythe geometry of instrument measure-ment specified by CEN,based on a viewing distance of 30 mfrom an arbitrary passenger vehicle with an eye height of 1.2 mand a single headlight mounting height of 0.65 m in the samevertical plane and a pavement stripe directly ahead of theheadlight.3.3.3 checkpoint areathe marking area to be evaluatedwithin each zone of measurement.3.3.4 global control areafor pavement markings,the roadlength containing the markings subjected to control,for ex-ample,lines,symbols,legends,pedestrian crossings,etc.3.3.5 inspection by attributesinspection whereby eitherthe unit of product is classified simply as acceptable ornon-acceptable,or the number of rejections in the unit ofproduct is counted,with respect to a given requirement or setof requirements.1This guide is under the jurisdiction of ASTM Committee D-4 on Road PavingMaterials and is the direct responsibility of Subcommittee D04.38 on HighwayTraffic Control Materials.Current edition approved July 10,1999.Published September 1999.Originallypublished as D 635998.Last previous edition D 635998.2Annual Book of ASTM Standards,Vol 04.03.3Annual Book of ASTM Standards,Vol 06.01.4Available from European Committee for Standardization:Central Secretariat:rue de Stassart 36,B-1050 Brussels,Belgium.5Available from Superintendent of Documents,U.S.Government PrintingOffice,Washington,DC.204021Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.3.3.5.1 DiscussionA discrete one-dimensional probabilitydistribution used in industrial quality control.Mathematicallyknown as hyper-geometric probability distribution function