Percolation-based health management of complex traffic systems

Abstract

System health management, which aims to ensure the safe and efficient operation of systems by reducing uncertain risks and cascading failures during their lifetime, is proposed for complex transportation systems and other critical infrastructures, especially under the background of the New Infrastructure Projects launched in China. Previous studies proposed numerous approaches to evaluate or improve traffic reliability or efficiency. Nevertheless, most existing studies neglected the core failure mechanism (i.e., spatio-temporal propagation of traffic congestion). In this article, we review existing studies on traffic reliability management and propose a health management framework covering the entire traffic congestion lifetime, from emergence, evolution to dissipation, based on the study of core failure modes with percolation theory. Aiming to be “reliable, invulnerable, resilient, potential, and active”, our proposed traffic health management framework includes modeling, evaluation, diagnosis, and improvement. Our proposed framework may shed light on traffic management for megacities and urban agglomerations around the world. This new approach may offer innovative insights for systems science and engineering in future intelligent infrastructure management.

A Comprehensive Review of Key Technologies for Enhancing the Reliability of Lithium-Ion Power Batteries

“…RUL prediction is the process of predicting the time it will take for a battery to initially decline to the failure threshold due to relatively short periods of battery experimental data. Reliable lifetime-prediction methods can save test time and cost [171][172][173][174][175]. Currently, one of the more commonly used RUL-prediction methods in machine learning is deep learning [154][155][156][157][158].…”

Toward energy-efficient urban rail transit with capacity constraints under a public health emergency

“…In the post-pandemic era, where the threat of recurring outbreaks or seasonal infectious diseases with varying variants remains, a gradual restoration of public transport services and connectivity is essential to support economic activities (Zeng et al, 2021;Luo et al, 2023). Effective control measures for Urban Rail Transit (URT) services, including PFC, are necessary during public health emergencies (e.g., to manage the challenges posed by the emergency and address the high demand for travel.…”

A cooperative strategy for optimizing vehicle relocations and staff movements in cities where several carsharing companies operate simultaneously

“…The rapid development of cities has caused a high travel demand for car usage (Wan et al, 2021). However, in big cities, the cost of car usage is increasing, coupled with parking problems, traffic congestion, and restrictions on private car usage such as the odd-even license plate rule (Shaheen, et al, 2015;Jian et al, 2020;Zeng et al, 2021). Carsharing is an emerging travel mode that allows people who want to rent cars for short periods and pay for their usage based on the travel distance and duration.…”