Transverse pavement profiling (TPP) systems that provide global positions of road surfaces are often susceptible to drift in the estimate of the global position over time. This practice describes the procedure to assess the amount of drift present in localization systems used in TPPs. The minimum requirements stipulated herein are intended to focus on the need for accurate and repeatable transverse measurements for network and project-level data collection. This standard practice is intended to be conducted in conjunction with three other standard practices to fully assess and certify the TPP in typical operating conditions. For static assessment, see AASHTO PP 106; for body motion assessment see AASHTO PP 107; and for ground reference and transverse width assessment see AASHTO PP 109.