ASTM D4956-00

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4956 – 00
Standard Specification for
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Retroreflective Sheeting for Traffic Control
This standard is issued under the fixed designation D 4956; the number immediately following the designation indicates the year of
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 (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 1349 Test Method for Reflectance Factor and Color by
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Spectrophotometry Using Bidirectional Geometry
1.1 This specification covers flexible, non-exposed glass
G 7 Practice for Atmospheric Environmental Exposure
bead lens and microprismatic, retroreflective sheeting designed
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Testing of Nonmetallic Materials
for use on traffic control signs, delineators, barricades, and
G 23 Practice for Operating Light-Exposure Apparatus
other devices.
(Carbon-Arc Type) With and Without Water for Exposure
1.2 The values stated in inch-pound units are to be regarded
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of Nonmetallic Materials
as the standard. The values given in parentheses are for
G 147 Practice for Conditioning and Handling of Nonme-
information only.
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tallic Materials for Natural and Artificial Weathering Tests
1.3 The following safety hazards caveat pertains only to the
G 152 Practice for Operating Open-Flame Carbon-Arc
test methods portion, Section 7, of this specification. This
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Light Apparatus for Exposure of Nonmetallic Materials
standard does not purport to address all of the safety concerns,
G 153 Practice for Operating Enclosed Carbon Arc Light
if any, associated with its use. It is the responsibility of the user
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Apparatus for Exposure of Nonmetallic Materials
of this standard to establish appropriate safety and health
2.2 Federal Specifications:
practices and determine the applicability of regulatory limita-
FP-92 Standard Specifications for Construction of Roads
tions prior to use.
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and Bridges on Federal Highway Projects
2. Referenced Documents
L-S-300C Federal Specification for Sheeting and Tape,
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Reflective: Non Exposed Lens
2.1 ASTM Standards:
2.3 AASHTO Specification:
B 209 Specification for Aluminum and Aluminum-Alloy
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M 268-84 I
Sheet and Plate
B 209M Specification for Aluminum and Aluminum-Alloy
3. Terminology
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Sheet and Plate [Metric]
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3.1 Definitions—Definitions of terms are as described in
B 449 Practice for Chromate Treatments on Aluminum
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Terminology E 284 and Practice E 808.
D 523 Test Method for Specular Gloss
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3.2 Definitions of Terms Specific to This Standard:
E 284 Terminology of Appearance
3.2.1 reboundable sheeting, n—retroreflective material in-
E 308 Practice for Computing the Colors of Objects by
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tended to be attached to flexible impact resistant plastic
Using the CIE System
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devices, such as traffic drum-like channelizing devices.
E 808 Practice for Describing Retroreflection
E 810 Test Method for Coefficient of Retroreflection or
4. Classification
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Retroreflective Sheeting
4.1 Retroreflective sheeting shall consist of a white or
E 991 Practice for Color Measurement of Fluorescent
4 colored sheeting having a smooth outer surface and that
Specimens
essentially has the property of a retroreflector over its entire
E 1164 Practice for Obtaining Spectrophotometric Data for
4 surface. There are six types and five classes of retroreflective
Object-Color Evaluation
sheeting. Typical examples of materials and applications are
E 1347 Test Method for Color and Color-Difference Mea-
4 provided for descriptive information only and are not intended
surement by Tristimulus (Filter) Colorimetry
to be limitations or recommendations.
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This specification is under the jurisdiction of ASTM Committee D04 on Road
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and Paving Materials and is the direct responsibility of Subcommittee D04.38 on Annual Book of ASTM Standards, Vol 14.02.
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Highway Traffic Materials. Available from Superintendent of Documents, U.S. Government Printing
Current edition approved Jan. 10, 2000. Published April 2000. Originally Office, Washington, DC 20402.
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published as D 4956 – 89. Last previous edition D 4956 – 99. Available from General Services Administration, 470 East L’Enfant Plaza S.W.,
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Annual Book of ASTM Standards, Vol 02.02. Suite 8100, Washington, DC 20407.
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Annual Book of ASTM Standards, Vol 02.05. Available from the American Association of State Highway and Transportation
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Annual Book of ASTM Standards, Vol 06.01. Officials, 444 N. Capitol St., N.W., Washington, DC 20001.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 4956
4.1.1 The typical applications for the retroreflective sheet- (38°C) without damage to the material.
ing addressed in this specifi
...