Standard Specification for Retroreflective Sheeting for Traffic Control

SCOPE
1.1 This specification covers flexible, non-exposed glass bead lens and microprismatic, retroreflective sheeting designed for use on traffic control signs, delineators, barricades, and other devices.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following safety hazards caveat pertains only to the test methods portion, Section 7, of this specification. 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.

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Publication Date
14-Mar-2007
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ASTM D4956-07 - Standard Specification for Retroreflective Sheeting for Traffic Control
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 4956 – 07
Standard Specification for
1
Retroreflective Sheeting for Traffic Control
This standard is issued under the fixed designation D4956; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope E 991 Practice for Color Measurement of Fluorescent
Specimens Using the One-Monochromator Method
1.1 This specification covers flexible, non-exposed glass
E 1164 Practice for Obtaining Spectrometric Data for
beadlensandmicroprismatic,retroreflectivesheetingdesigned
Object-Color Evaluation
for use on traffic control signs, delineators, barricades, and
E1247 PracticeforDetectingFluorescenceinObject-Color
other devices.
Specimens by Spectrophotometry
1.2 The values stated in inch-pound units are to be regarded
E1347 Test Method for Color and Color-Difference Mea-
as the standard. The values given in parentheses are for
surement by Tristimulus Colorimetry
information only.
E1349 Test Method for Reflectance Factor and Color by
1.3 The following safety hazards caveat pertains only to the
Spectrophotometry Using Bidirectional (45°:0° or 0°:45°)
test methods portion, Section 7, of this specification. This
Geometry
standard does not purport to address all of the safety concerns,
E2152 Practice for Computing the Colors of Fluorescent
if any, associated with its use. It is the responsibility of the user
Objects from Bispectral Photometric Data
of this standard to establish appropriate safety and health
E2153 Practice for Obtaining Bispectral Photometric Data
practices and determine the applicability of regulatory limita-
for Evaluation of Fluorescent Color
tions prior to use.
E2301 TestMethodforDaytimeColorimetricPropertiesof
2. Referenced Documents
Fluorescent Retroreflective Sheeting and Marking Materi-
2
als for High Visibility Traffic Control and Personal Safety
2.1 ASTM Standards:
Applications Using 45°:Normal Geometry
B209 Specification for Aluminum and Aluminum-Alloy
G7 Practice for Atmospheric Environmental Exposure
Sheet and Plate
Testing of Nonmetallic Materials
B209M Specification for Aluminum and Aluminum-Alloy
G147 Practice for Conditioning and Handling of Nonme-
Sheet and Plate [Metric]
tallic Materials for Natural andArtificial Weathering Tests
B449 Specification for Chromates on Aluminum
G151 Practice for Exposing Nonmetallic Materials in Ac-
D523 Test Method for Specular Gloss
celerated Test Devices that Use Laboratory Light Sources
E284 Terminology of Appearance
G152 PracticeforOperatingOpenFlameCarbonArcLight
E308 Practice for Computing the Colors of Objects by
Apparatus for Exposure of Nonmetallic Materials
Using the CIE System
E808 Practice for Describing Retroreflection
3. Terminology
E810 Test Method for Coefficient of Retroreflection of
3.1 Definitions—Definitions of terms are as described in
Retroreflective Sheeting Utilizing the Coplanar Geometry
Terminology E284 and Practice E808.
E811 Practice for Measuring Colorimetric Characteristics
3.2 Definitions of Terms Specific to This Standard:
of Retroreflectors Under Nighttime Conditions
3.2.1 reboundable sheeting, n—retroreflective material in-
tended to be attached to flexible impact resistant plastic
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This specification is under the jurisdiction ofASTM Committee D04 on Road
devices, such as traffic drum-like channelizing devices.
and Paving Materials and is the direct responsibility of Subcommittee D04.38 on
Highway Traffic Control Materials.
4. Classification
Current edition approved March 15, 2007. Published March 2007. Originally
4.1 Retroreflective sheeting shall consist of a white or
approved in 1989. Last previous edition approved in 2005 as D4956–05.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
colored sheeting having a smooth outer surface and that
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
essentially has the property of a retroreflector over its entire
Standards volume information, refer to the standard’s Document Summary page on
surface. There are ten types and five classes of retroreflective
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4956–07
sheeting. Types are determined by conformance to the retrore- 4.2.6 Type VI—Anelastomerichigh-intensityretroreflective
flectance, color, and durability requirements listed in 6.1 and sheeting without adhesive. This sheeting is typically a vinyl
may be of any construction providing that those requirements
microprisma
...

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