AASHTO T 257 : 1996(R2013)
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
METHOD OF TEST FOR INSTRUMENTAL PHOTOMETRIC MEASUREMENTS OF RETROREFLECTIVE MATERIALS AND RETROREFLECTIVE DEVICES
Hardcopy , PDF
28-12-2022
English
01-01-2013
1. SCOPE
2. REFERENCED DOCUMENTS
3. SIGNIFICANCE AND USE
4. TERMINOLOGY
5. QUANTITIES AND UNITS FOR RETROREFLECTIVE PHOTOMETRIC
MEASUREMENTS
6. REQUIREMENTS TO BE STATED IN SPECIFICATIONS
7. APPARATUS
8. TEST SPECIMENS
9. CALIBRATION
10. TEST PROCEDURES
11. REPORT
12. PRECISION AND ACCURACY
13. REFERENCES
APPENDIX (Nonmandatory Information)
X1 - DETERMINING CORRELATED COLOR TEMPERATURE
X2 - DETERMINING PHOTORECEPTOR LINEARITY
X3 - VERIFYING PHOTOPIC RESPONSIVITY
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