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Standard Test Method for Retroreflectance of Horizontal Coatings
ASTM D4061-25
Organization:
ASTM - ASTM International
Year: 2025
Abstract: 5.1 The quantity coefficient of retroreflected luminance is a measure of the reflected luminance in the direction of the observer. This is the light returned by the retroreflective surface to the observer from the source, which in practice is the vehicle headlamp. 5.2 This test method may be used as a measure of the nighttime performance of horizontally applied surfacing materials used on highway surfaces for lane markings and other traffic control purposes. 5.3 Since this test method is a laboratory procedure, test specimens must be prepared so that they can be mounted on the specimen holder. Specimens measured by this laboratory method may be used as transfer standards for the calibration of portable instrumentation. 5.4 Specimen selection and preparation may significantly influence the results of this test method.
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Standard Test Method for Retroreflectance of Horizontal Coatings
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| contributor author | ASTM - ASTM International | |
| date accessioned | 2025-09-30T19:25:30Z | |
| date available | 2025-09-30T19:25:30Z | |
| date copyright | 2025 | |
| date issued | 2025 | |
| identifier other | d4061-25.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=authoCA58ear3081D206861598F1EFDEC014A/handle/yse/343461 | |
| description abstract | 5.1 The quantity coefficient of retroreflected luminance is a measure of the reflected luminance in the direction of the observer. This is the light returned by the retroreflective surface to the observer from the source, which in practice is the vehicle headlamp. 5.2 This test method may be used as a measure of the nighttime performance of horizontally applied surfacing materials used on highway surfaces for lane markings and other traffic control purposes. 5.3 Since this test method is a laboratory procedure, test specimens must be prepared so that they can be mounted on the specimen holder. Specimens measured by this laboratory method may be used as transfer standards for the calibration of portable instrumentation. 5.4 Specimen selection and preparation may significantly influence the results of this test method. | |
| language | English | |
| title | Standard Test Method for Retroreflectance of Horizontal Coatings | en |
| title | ASTM D4061-25 | num |
| type | standard | |
| status | Active | |
| tree | ASTM - ASTM International:;2025 | |
| contenttype | fulltext | |
| scope | 1.1 This test method describes the instrumental measurement of the retroreflective properties of horizontal surfacing materials, such as traffic stripe paint systems, traffic tapes, and traffic surface symbols. 1.2 Specimen preparation, size, and shape must be determined and specified by the user of this test method. Likewise, the user must specify the observation and entrance angles to be used (see Fig. 1). 1.4 This test method is a laboratory test and requires a facility that can be darkened sufficiently so that stray light does not affect the test results. This facility must be capable of housing the required 15 m test distance. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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. | |
| identifier DOI | 10.1520/D4061-25 |