AASHTO PP 110-21 PDF Download

Standard Practice for Assessment of Ground Reference Data for Transverse Pavement Profiling System Assessment (AASHTO PP 110-21) outlines the procedures for evaluating the accuracy and precision of ground reference data collected using a ground reference equipment (GRE) system, specifically for use in transverse pavement profiling. The standard requires the evaluation of four different surfaces: a certified straightedge, a bounding beam with gauge blocks, a road surface, and a macrotexture surface.

The accuracy and precision of the GRE system are assessed by analyzing various measures, including transverse, longitudinal, and vertical measurement error, spacing, straightness, and horizontal plane flatness. The aim is to ensure that the GRE system can produce road surface measurements with an acceptable level of accuracy for ground reference data in accordance with the specifications outlined in AASHTO PP 109.

The evaluation process requires the measurement and analysis of all four surfaces to verify that the GRE system can accurately measure road surfaces, both smooth/flat surfaces (e.g., straightedge and gauge blocks) and textured surfaces (e.g., macrotexture surface). This ensures that the system is capable of correctly measuring road surfaces with varying levels of roughness and dimensions as required for the transverse pavement profiling system.

It is important to note that if any conflicts arise between this standard and referenced documents, such as ASTM standards, the procedures outlined in AASHTO PP 110-21 take precedence for the purpose of ground reference data assessment.

This standard is intended to be used as a preliminary assessment when evaluating a new GRE system, as well as when acquiring ground reference data for transverse pavement profiling in accordance with AASHTO PP 109.