Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO PP 110:2021
• Năm ban hành / Publication date: 2021
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Practice for Assessment of Ground Reference Data for Transverse Pavement Profiling System Assessment
• Số trang / Page: 17

Phạm vi áp dụng / Scope of standard

This practice describes the procedures used to assess ground reference data used in PP 109.

This practice describes the accuracy and precision analysis needed to ensure a ground reference equipment (GRE) system is collecting acceptable quality ground reference data. The accuracy and precision are evaluated using four surfaces: a certified straightedge, a bounding beam with gauge blocks, a road surface, and a macrotexture surface. The measures evaluated are: transverse, longitudinal, and vertical measurement error; transverse, longitudinal, and vertical measurement spacing; transverse straightness; and horizontal plane flatness.

It is necessary for all four surfaces to be measured and analyzed to ensure the GRE is capable of producing road surface measurements with accuracy that is acceptable for ground reference data in PP 109. To verify these accuracies are achieved for a road surface, a mix of certified smooth/flat surfaces (i.e., straightedge and gauge blocks) must be coupled with textured surfaces (e.g., macrotexture surface) with verifiable roughness and dimensions to ensure the GRE is correctly measuring road surfaces that have a nominal roughness.

If any part of this practice is in conflict with referenced documents, such as ASTM standards, this practice takes precedence for its purposes.

This test is designed to be conducted as the first steps in assessing a newly proposed ground reference data acquisition device and when acquiring ground reference data for PP 109.

This practice 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 practice to establish appropriate safety and health practices and determine the applicability of regulatory limitations related to and prior to its use.