Performance Measures to Assess Resiliency and Efficiency of Transit Systems

Transit agencies are interested in assessing the short-, mid-, and long-term performance of infrastructure with the objective of enhancing resiliency and efficiency. This report addresses three distinct aspects of New Jersey’s Transit System: 1) resiliency of bridge infrastructure, 2) resiliency of public transit systems, and 3) efficiency of transit systems with an emphasis on paratransit service. This project proposed a conceptual framework to assess the performance and resiliency for bridge structures in a transit network before and after disasters utilizing structural health monitoring (SHM), finite element (FE) modeling and remote sensing using Interferometric Synthetic Aperture Radar (InSAR). The public transit systems in NY/NJ were analyzed based on their vulnerability, resiliency, and efficiency in recovery following a major natural disaster

Integration and Operation of an Advanced Weigh-in-Motion (A-WIM) System for Autonomous Enforcement of Overweight Trucks

69A3551747119The ultimate objective of this project is to assist and support the NYCDOT in establishing the legislation to operate the autonomous OW enforcement system and extend the service life of the BQE corridor. This project evaluates the effectiveness of the implemented enforcement system. The report first presents the work on the existing advanced weight-in-motion system (A-WIM) and proposed new A-WIM system, as well as the automated license plate recognition (ALPR) system. A new structural health monitoring (SHM) system was also implemented in the testbed to evaluate the responses of structures under the traffic. Then evaluations of the multiple systems in the testbed are presented by presenting the results of accuracy of different weighing sensors, and practices of automated enforcement. Lastly, reliability-based live load factors for bridge load rating are developed

Implementation and Effectiveness of Autonomous Enforcement of OW Trucks in an Urban Infrastructure Environment

USDOT 69A3551747124In this study, the team presented the effort to summarize different WIM standards, develop the calibration procedure for the A-WIM system, and implement the calibration procedure to prove that the A-WIM system is capable of complying with ASTM E1318-09 Type III accuracy. Three prevailing WIM standards were compiled and compared, ASTM E1318-09, COST 323, and OIML R134-1. At least three trucks are required for an excessive number of calibration/optimization tests to meet the accuracy and compliance level and the Type-Approval test requirement of the ASTM E1318-09. The calibration and optimization tests provided the accuracy and compliance required in ASTM E1318-09 even though the pavement conditions did not meet the ASTM E1318-09 requirement. Based on the preliminary analysis of the change in the number of trucks after the enforcement, direct enforcement would reduce the number of overweight trucks by up to 76.9% for > 10% overweight trucks. More in-depth study would be required to evaluate the efficiency of direct enforcement