Author: Pedro Antonio Serigos

Publisher:

Published: 2015

Total Pages: 57

ISBN-13:

The first two phases of this research study provided a project-level assessment of the accuracy and precision of the automated 3D system developed by the Texas Department of Transportation (TxDOT), and state-of-the-practice commercially available automated systems for the high-speed measurement of pavement surface distresses, rutting, texture and cross slope. The third phase of this study had the objective of extending the automated systems' evaluation with a focus on network-level processes and applications. For this purpose, TxDOT initiated a pilot study with two pavement distress data collection vendors to collect full network-level semi-automated data (as per TxDOT Pavement Management Information System [PMIS] specifications) on the entire network in the Bryan and Houston districts, in conjunction with the PMIS Fiscal Year 2014 data collection season. The two districts selected for the pilot study represent highway characteristics from rural, urban, and metropolitan areas in the state of Texas. The two vendors that collected semi-automated data for the pilot study were Fugro-Roadware and Pathway Services. Fugro's data collection was performed using two Automatic Road Analyzer survey vans equipped with the INO Laser Crack Measurement System and Pathway Services' data collection was performed using two PathRunner Data Collections Vehicles equipped with Pathway 3D Systems. The comparative analyses were conducted on the PMIS aggregated scores (including Ride Score, Distress Score, and Condition Score) as well as on individual distress ratings for instances of alligator cracking, longitudinal cracking, rutting, spalling, punchouts, and failures. Each type of comparison was further analyzed by breaking down the collected highway network into different experimental factors, such as the highway system and pavement surface type. In addition, this report includes an analysis of the automated systems' production rates.