ASTM D4956-01

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4956 – 01
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.
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1. Scope surement by Tristimulus (Filter) Colorimetry
E 1349 Test Method for Reflectance Factor and Color by
1.1 This specification covers flexible, non-exposed glass
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Spectrophotometry Using Bidirectional Geometry
bead lens and microprismatic, retroreflective sheeting designed
G 7 Practice for Atmospheric Environmental Exposure
for use on traffic control signs, delineators, barricades, and
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Testing of Nonmetallic Materials
other devices.
G 23 Practice for Operating Light-Exposure Apparatus
1.2 The values stated in inch-pound units are to be regarded
(Carbon-Arc Type) With and Without Water for Exposure
as the standard. The values given in parentheses are for
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of Nonmetallic Materials
information only.
G 147 Practice for Conditioning and Handling of Nonme-
1.3 The following safety hazards caveat pertains only to the
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tallic Materials for Natural and Artificial Weathering Tests
test methods portion, Section 7, of this specification. This
G 151 Practice for Exposing Nonmetallic Materials in Ac-
standard does not purport to address all of the safety concerns,
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celerated Test Devices that Use Laboratory Light Sources
if any, associated with its use. It is the responsibility of the user
G 152 Practice for Operating Open Flame Carbon Arc Light
of this standard to establish appropriate safety and health
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Apparatus for Exposure of Nonmetallic Materials
practices and determine the applicability of regulatory limita-
G 153 Practice for Operating Enclosed Carbon Arc Light
tions prior to use.
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Apparatus for Exposure of Nonmetallic Materials
2. Referenced Documents 2.2 Federal Specifications:
FP-92 Standard Specifications for Construction of Roads
2.1 ASTM Standards:
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and Bridges on Federal Highway Projects
B 209 Specification for Aluminum and Aluminum-Alloy
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L-S-300C Federal Specification for Sheeting and Tape,
Sheet and Plate
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Reflective: Non Exposed Lens
B 209M Specification for Aluminum and Aluminum-Alloy
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2.3 AASHTO Specification:
Sheet and Plate [Metric]
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M 268-00 I
B 449 Specification for Chromates on Aluminum
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D 523 Test Method for Specular Gloss
3. Terminology
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E 284 Terminology of Appearance
3.1 Definitions—Definitions of terms are as described in
E 308 Practice for Computing the Colors of Objects by
4 Terminology E 284 and Practice E 808.
Using the CIE System
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3.2 Definitions of Terms Specific to This Standard:
E 808 Practice for Describing Retroreflection
3.2.1 reboundable sheeting, n—retroreflective material in-
E 810 Test Method for Coefficient of Retroreflection or
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tended to be attached to flexible impact resistant plastic
Retroreflective Sheeting
devices, such as traffic drum-like channelizing devices.
E 991 Practice for Color Measurement of Fluorescent
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Specimens
4. Classification
E 1164 Practice for Obtaining Spectrophotometric Data for
4 4.1 Retroreflective sheeting shall consist of a white or
Object-Color Evaluation
colored sheeting having a smooth outer surface and that
E 1347 Test Method for Color and Color-Difference Mea-
essentially has the property of a retroreflector over its entire
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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 14.04.
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Highway Traffic Control Materials. Available from Superintendent of Documents, U.S. Government Printing
Current edition approved Jan. 10, 2001. Published March 2001. Originally Office, Washington, DC 20402.
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published as D 4956 – 89. Last previous edition D 4956 – 00. 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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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 4956
A
TABLE 1 Type VII Sheeting
surface. There are nine types and five
...