Protocols for Network-Level Macrotexture Measurement (2021) / Chapter Skim
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125 A P P E N D I X Draft AASHTO Protocols
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126 Protocols for Network-Level Macrotexture Measurement Proposed Standard Specification for Equipment for Measuring Macrotexture of Pavements at Highway Speeds AASHTO Designation: M X1 INTRODUCTION The macrotexture of a pavement surface influences the friction between the tire and the road, noise at the tire-pavement interface, rolling resistance of vehicles, and tire wear.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 127 2.3.
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128 Protocols for Network-Level Macrotexture Measurement line can be along the direction of travel, perpendicular to the direction of travel, or at any orientation to the direction of travel.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 129 4.1.2.
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130 Protocols for Network-Level Macrotexture Measurement 5.1.6. The equipment shall be capable of measuring macrotexture over an ambient temperature range of 0°C to 44°C (35°F to 110°F)
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 131 collection where data are collected to verify the macrotexture of a newly placed pavement.
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132 Protocols for Network-Level Macrotexture Measurement or less. The line laser shall be mounted on the host vehicle such that the collected data will be perpendicular to the travel direction or at an angle to the travel direction.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 133 Equipment shutdown.
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134 Protocols for Network-Level Macrotexture Measurement or when the automatic triggering mechanism detects a reflective mark placed on the pavement or on a cone that is placed on the side of the road. The equipment operation functions shall provide everything necessary for the operator to perform data collection in a user-friendly manner.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 135 single dropout will occur in the data stream, while in other cases, dropouts can occur over a series of connected data points.
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136 Protocols for Network-Level Macrotexture Measurement 6.1.8.4. After addressing dropouts and spikes, compute the desired macrotexture parameter.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 137 Table 2.
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138 Protocols for Network-Level Macrotexture Measurement the side of the road. Thereafter, the software shall have the capability to automatically compute a calibration factor for the DMI, which is saved.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 139 10.
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140 Protocols for Network-Level Macrotexture Measurement Proposed Standard Practice for Operating Equipment for Measuring Macrotexture at Highway Speeds AASHTO Designation: R X2 1.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 141 Sayers, M
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142 Protocols for Network-Level Macrotexture Measurement 4.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 143 5.2.2.
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144 Protocols for Network-Level Macrotexture Measurement placed under the sensor while the vehicle is stationary. During the test, do not lean on the vehicle or cause it to move in any way.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 145 The operator of the equipment should tabulate the measurements and record them in a calibration log.
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146 Protocols for Network-Level Macrotexture Measurement If a vendor is collecting network-level macrotexture data for an agency, and the agency also has equipment that can measure macrotexture, both the vendor and the agency should collect data at the control sections. The MPD values obtained by both parties' equipment should be compared and must agree within 10 percent.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 147 If an agency is measuring the macrotexture, and the equipment comes back to the office every weekend, establish at least two verification or control sections close to the office.
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148 Protocols for Network-Level Macrotexture Measurement APPENDIX A: GUIDELINES - QUALITY ASSURANCE PLAN A1.1. Quality Assurance (QA)
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 149 Proposed Standard Practice for Certification of High-Speed Macrotexture Measurement Equipment AASHTO Designation: R X3 1.
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150 Protocols for Network-Level Macrotexture Measurement 3.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 151 5.3.
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152 Protocols for Network-Level Macrotexture Measurement manufacturer to adjust or repair the equipment such that the equipment will be able to pass the test.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 153 7.4.
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154 Protocols for Network-Level Macrotexture Measurement 7.5. Data Collection with High-Speed Macrotexture Equipment -- Ensure that the sensor spacing in the equipment match the value specified by the Owner-Agency, and that each sensor is equidistant from the center of the vehicle.
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Draft American Association of State Highway and Transportation Officials (AASHTO) Protocols 155 Identification of the equipment tested (i.e., make, model serial number, software version, owner)
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156 Protocols for Network-Level Macrotexture Measurement approximately at the end of the test section. This test is aimed at evaluating the effect of acceleration on MPD.
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Abbreviations and acronyms used without denitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America's Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012)
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Transportation Research Board 500 Fifth Street, NW Washington, DC 20001 ADDRESS SERVICE REQUESTED ISBN 978-0-309-67403-4 9 7 8 0 3 0 9 6 7 4 0 3 4 9 0 0 0 0
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