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AASHTO PP 74-13 (2015)
- Standard Practice for Determination of Size and Roundness of Glass Beads Used in Traffic Markings by Means of Computerized Optical Method
- standard by American Association of State and Highway Transportation Officials, 2013
- Publisher: AASHTO
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This practice describes measuring size and roundness of translucent glass beads used in traffic markings with computerized optical equipment. This practice is intended for glass beads from 0.15 mm to 2.35 mm in diameter.
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