ASTM_D_6628_-_16.pdf

Designation:D662816Standard Specification forColor of Pavement Marking Materials1This standard is issued under the fixed designation D6628;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the daytime and nighttimecolor of retroreflective pavement marking materials used fortraffic control lane markings and symbols on road surfaces.Itis intended to apply throughout the service life of the material.1.2 This specification applies to both painted and tape lines,including thermoplastic,epoxy and other types.1.3 This specification is not applicable to the testing,forquality control purposes,of marking material without addeddrop-on beads.1.4 In addition,it does not describe requirements other thancolor such as retroreflectance.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5.1 ExceptionThis specification is noted to be a SIdocument,where angles are generally expressed in radians.However,as angles used in retroreflection have historicallybeen identified in degrees,the International Committee forWeights and Measures(CIPM,Comit International des Poidset Mesures)accepts the use of degrees with SI units,andEuropean Normatives and documents from the InternationalCommission on Illumination(CIE)use degrees for retroreflec-tion geometry.2.Referenced Documents2.1 ASTM Standards:2D4061 Test Method for Retroreflectance of Horizontal Coat-ingsD7585/D7585M Practice for Evaluating RetroreflectivePavement Markings Using Portable Hand-Operated In-strumentsE284 Terminology of AppearanceE308 Practice for Computing the Colors of Objects by Usingthe CIE SystemE811 Practice for Measuring Colorimetric Characteristics ofRetroreflectors Under Nighttime ConditionsE1349 Test Method for Reflectance Factor and Color bySpectrophotometry Using Bidirectional(45:0 or 0:45)Geometry2.2 CIE Publications:No.15.2 Colorimetry3No.39.2 Recommendations for Surface Colours for VisualSignalling33.Terminology3.1 Definitions:3.1.1 Definitions in Practice E308 and of appearance termsin Terminology E284are applicable to this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 pavement marking structured materialsa structuredroad marking has faces or edges in a regular or random patternthat are tilted towards the direction of traffic in order toenhance retroreflection in wet or rainy conditions or to produceacoustic or vibrational effects by the passage of wheels,orboth.The pattern can be produced by non-uniform applicationof material in the liquid state,by reworking the surface ofapplied material while still liquid,or by other suitable means.4.Significance and Use4.1 This specification is intended for use during the lifetimeof the retroreflective pavement marking on the road surface.Specifications for characteristics other than color are found inother ASTM documents.5.Performance Requirements5.1 Chromaticity LimitsThe material must plot within theboundaries described by the four corner points listed in Tables1 and 2 when measured in accordance with the test methods inSection 7.5.1.1 Table 1Daytime(x,y)chromaticity coordinates ofthe corners of the regions for the colors of white,yellow,blueand red pavement markings.See Fig.1.1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.38 onHighway Traffic Control Materials.Current edition approved Oct.1,2016.Published October 2016.Originallyapproved in 2001.Last previous edition approved in 2015 as D6628 03(2015).DOI:10.1520/D6628-16.2For 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.3Available from USNC-CIE Publications Office,TLA Lighting Consultants,Inc.,7 Pond Street,Salem,MA 01970.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.2 Table 2Nighttime(x,y)chromaticity coordinates ofthe corners of the regions for the colors of white and yellowpavement markings.See Fig.2.5.1.3 Chromaticity and RetroreflectanceThe third dimen-sion of the perceived appearance of the road marking at nightis the retroreflectance.This quantity is specified in otherASTMdocuments on pavement markings and is not part of pavementmarking nighttime color specification.Research has shown thatthe nighttime color as specified by chromaticity is sufficientand adequate for the color naming of the material as viewedunder nighttime conditions.5.2 Daytime Lightness Limits(Y Tristimulus Coordinate)The lightness limits shall conform to Table 3.(The 45