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ASTM E2302-03a

(Test Method)

Standard Test Method for Measurement of the Luminance Coefficient Under Diffuse Illumination of Pavement Marking Materials Using a Portable Reflectometer

Standard Test Method for Measurement of the Luminance Coefficient Under Diffuse Illumination of Pavement Marking Materials Using a Portable Reflectometer

SIGNIFICANCE AND USE
The quality of the stripe for visibility in daylight or under road lighting is determined by the luminance coefficient under diffuse illumination, Qd, and depends on the materials used, age, and wear pattern. These conditions shall be observed and noted by the user.
Under the same conditions of illumination and viewing, higher levels of Qd correspond to higher levels of lightness.
Reflectivity of pavement (road) markings degrade with traffic wear and require periodic measurement to ensure that sufficient line visibility is provided to drivers.
For a given viewing distance, measurements of Qd made with a reflectometer having a geometry corresponding to that distance are a good indicator of the visual ranking of material measured.
specified by CEN, the measurement geometry of the instrument is based on a viewing distance of 30 m and an eye height of 1.2 m.
It shall be the responsibility of the user to employ an instrument having the specified co-viewing angle.
SCOPE
1.1 This test method covers measurement of the luminance coefficient under diffuse illumination of horizontal pavement markings, such as traffic stripes and surface symbols, and pavement surfaces, in a particular viewing direction using a portable reflectometer.
Note 1—The luminance coefficient under diffuse illumination is a measure of the reflection of horizontal pavement markings and pavement surfaces in a particular viewing direction in daylight or under road lighting. Diffuse illumination approximates daylight illumination from the overcast sky, and road lighting as an average of locations on the pavement surface.
1.2 The co-viewing angle of the reflectometer affects the readings. As specified by the European Committee for Standardization (CEN), the co-viewing angle shall be 2.29°.
1.3 This test method is intended to be used for field measurement of pavement markings and pavement surfaces but may be used to measure the performance of materials on sample panels before placing the marking material in the field.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Nov-2003
ICS
93.080.20 - Road construction materials
Technical Committee
E12 - Color and Appearance
Drafting Committee
E12.10 - Retroreflection
Current Stage
Ref Project

Relations

Replaces
ASTM E2302-03 - Standard Test Method for Measurement of the Luminance Coefficient Under Diffuse Illumination of Pavement Marking Materials with CEN-Prescribed Geometry Using a Portable Reflectometer
Effective Date
01-Dec-2003
Replaced By
ASTM E2302-03a(2009) - Standard Test Method for Measurement of the Luminance Coefficient Under Diffuse Illumination of Pavement Marking Materials Using a Portable Reflectometer
Effective Date
01-Aug-2009
Referred By
ASTM D8367-21 - Standard Practice for Making a Laboratory Pavement Marking Sample Using a Pavement Marking and Drop-on Particles
Effective Date
01-Dec-2003

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ASTM E2302-03a - Standard Test Method for Measurement of the Luminance Coefficient Under Diffuse Illumination of Pavement Marking Materials Using a Portable ReflectometerASTM E2302-03a - Standard Test Method for Measurement of the Luminance Coefficient Under Diffuse Illumination of Pavement Marking Materials Using a Portable Reflectometer
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ASTM E2302-03a - Standard Test Method for Measurement of the Luminance Coefficient Under Diffuse Illumination of Pavement Marking Materials Using a Portable Reflectometer
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 2302 – 03a
Standard Test Method for
Measurement of the Luminance Coefficient Under Diffuse
Illumination of Pavement Marking Materials Using a Portable
1
Reflectometer
This standard is issued under the fixed designation E2302; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Other Standard:
CEN EN 1436 Road Marking Materials—Road Marking
1.1 This test method covers measurement of the luminance
3
Performance for Road Users
coefficient under diffuse illumination of horizontal pavement
markings, such as traffic stripes and surface symbols, and
3. Terminology
pavement surfaces, in a particular viewing direction using a
3.1 The terminology used in this test method generally
portable reflectometer.
agrees with that used in Terminology E284.
NOTE 1—The luminance coefficient under diffuse illumination is a
3.2 Definitions:
measure of the reflection of horizontal pavement markings and pavement
3.2.1 luminance coeffıcient under diffuse illumination; Qd,
surfaces in a particular viewing direction in daylight or under road
n—the ratio of luminance, L, in a particular viewing direction,
lighting.Diffuseilluminationapproximatesdaylightilluminationfromthe
of a projected surface to the illuminance of diffuse illumina-
overcastsky,androadlightingasanaverageoflocationsonthepavement
tion, E, at the surface on the plane of the surface, expressed in
surface.
-2 -1
candelas per square metre per lux (cd·m ·lx ).
1.2 The co-viewing angle of the reflectometer affects the
3.2.1.1 Discussion—Qd has a range from zero up to a
readings. As specified by the European Committee for Stan-
-2 -1
maximum of 1/p = approximately 0.318 cd·m ·lx . For
dardization (CEN), the co-viewing angle shall be 2.29°.
convenience, the units used commonly are millicandelas per
1.3 This test method is intended to be used for field
-2 -1
square metre per lux (mcd·m ·lx ) providing a range from
measurementofpavementmarkingsandpavementsurfacesbut
-2 -1
zero up to 1000/p = approximately 318 mcd·m ·lx .
may be used to measure the performance of materials on
3.2.2 co-viewing angle, a, n—the angle between the plane
sample panels before placing the marking material in the field.
of the pavement marking surface and the observation axis.
1.4 This standard does not purport to address all of the
3.2.3 portable reflectometer, n—ahand-heldinstrumentthat
safety concerns, if any, associated with its use. It is the
can be used in the field or laboratory for measurement of
responsibility of the user of this standard to establish appro-
luminance coefficient under diffuse illumination.
priate safety and health practices and determine the applica-
3.2.4 instrument standard, n—working standard used to
bility of regulatory limitations prior to use.
standardize the portable reflectometer.
2. Referenced Documents
4. Summary of Test Method
2
2.1 ASTM Standards:
4.1 This test method involves the use of commercial por-
E284 Terminology of Appearance
table reflectometers for determining the luminance coefficient
E809 Practice for Measuring Photometric Characteristics
under diffuse illumination in a particular viewing direction of
of Retroreflectors
horizontal coatings materials used in pavement markings.
4.2 The co-viewing angle is fixed at 2.29°.
1
This test method is under the jurisdiction of ASTM Committee E12 on Color 4.3 The reflectometers use an external panel or other instru-
and Appearance and is the direct responsibility of Subcommittee E12.10 on
ment standard of known luminance coefficient under diffuse
Retroreflection.
illumination, Qd.
Current edition approved Dec. 1, 2003. Published December 2003. Originally
approved in 2003. Last previous edition approved in 2003 as E2302–03.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from European Committee for Standardization, Central Secretariat
the ASTM website. (CEN), rue de Stassart 36, B1050 Brussels, Belgium.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E 2302 – 03a
4.4 The portable reflectometer is placed directly over the that flux received on the sample is approximately homoge-
pavement marking to be measured, ensuring that the measure- neous. For measurements from all positions in the sample gate
ment area of the reflectometer fits within the width of the and in all directions, using a collecti
...

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5.1 The quality of the stripe for visibility in daylight or under road lighting is determined by the luminance coefficient under diffuse illumination, Qd, and depends on the materials used, age, and wear pattern. These conditions shall be observed and noted by the user.  
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SCOPE
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4.1 The nighttime performance of pavement markings is determined by the coefficient of retroreflected luminance, RL, be it dry or wet, and depends on the materials used, age, and wear pattern. These conditions shall be observed and noted by the user.  
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5.1 This test method produces a measure of retroreflective efficiency (coefficient of retroreflected luminance, RL-2) for a pavement marking system under conditions of continuous wetting. The test result depends on factors such as the pavement marking binder and optic materials, their application, wear from traffic and plowing, wetting rate, and road grade and cross slope.  
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1.1 This test method covers a measurement of the wet retroreflective (RL-2) properties of horizontal pavement marking materials, such as traffic stripes and road surface symbols. A standardized method utilizing a standardized continuous wetting device and a portable retroreflectometer is described to obtain measurements of the wet retroreflective properties of horizontal pavement markings.  
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4.1 Sampling is as important as testing, and precautions shall be taken to obtain samples to show the true nature and condition of the materials.  
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ASTM
ASTM D517-23(Specification)
Standard Specification for Asphalt Plank

ABSTRACT
This specification covers asphalt plank used for bridge decks as well as for industrial floors. Asphalt planks shall be classified according to usage: Type Ia; Type Ib; and Type II. Asphalt plank shall be formed from a mixture of asphalt, fibers, modifiers, or a combination thereof, and mineral filler in such a manner as to produce a uniformly dense mass. The following test methods shall be intended to measure those attributes necessary to measure the ability of asphalt plank to provide a reasonably long and satisfactory service: absorption; brittleness; dimensions; and hardness.
SCOPE
1.1 This specification covers asphalt plank used for bridge decks as well as for industrial floors.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Technical specification
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    English language
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  • Technical specification
    3 pages
    English language
    sale 15% off