Helai Huang
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View article: Rear-end conflicts analysis at non-signalized intersection based on vehicles trajectory data
Rear-end conflicts analysis at non-signalized intersection based on vehicles trajectory data Open
With the raise of implementation of both signalized and ITS intersections at many municipalities around the world, countries such as Germany, USA, Canada and others still use the stop-control (non-signalized) intersections in their traffic…
View article: Multidimensional Evaluation of Autonomous Driving Test Scenarios Based on AHP-EWN-TOPSIS Models
Multidimensional Evaluation of Autonomous Driving Test Scenarios Based on AHP-EWN-TOPSIS Models Open
The advancement of autonomous vehicles (AVs) requires robust evaluation methods to ensure both safety and efficiency. To incorporate multiple dimensions in designing test scenarios, this paper proposes a multidimensional evaluation framewo…
View article: Adaptive Transit Signal Priority Control for Traffic Safety and Efficiency Optimization: A Multi-Objective Deep Reinforcement Learning Framework
Adaptive Transit Signal Priority Control for Traffic Safety and Efficiency Optimization: A Multi-Objective Deep Reinforcement Learning Framework Open
This study introduces a multi-objective deep reinforcement learning (DRL)-based adaptive transit signal priority control framework designed to enhance safety and efficiency in mixed-autonomy traffic environments. The framework utilizes rea…
View article: Dual-Objective Reinforcement Learning-Based Adaptive Traffic Signal Control for Decarbonization and Efficiency Optimization
Dual-Objective Reinforcement Learning-Based Adaptive Traffic Signal Control for Decarbonization and Efficiency Optimization Open
To improve traffic efficiency, adaptive traffic signal control (ATSC) systems have been widely developed. However, few studies have proactively optimized the air environmental issues in the development of ATSC. To fill this research gap, t…
View article: The electric vehicle routing problem of a new mobile charging service
The electric vehicle routing problem of a new mobile charging service Open
A novel mobile charging service that utilizes vehicle-to-vehicle (V2V) charging technology has recently been proposed as a supplement to fixed charging infrastructure (CI), enabling electric vehicles (EVs) to exchange electricity. This stu…
View article: Exploring the Macro Economic and Transport Influencing Factors of Urban Public Transport Mode Share: A Bayesian Structural Equation Model Approach
Exploring the Macro Economic and Transport Influencing Factors of Urban Public Transport Mode Share: A Bayesian Structural Equation Model Approach Open
The public transportation priority strategy is a significant way to alleviate urban traffic congestion, and the urban public transport mode share (UPTMS) is a crucial indicator to measure the performance of public transportation priority s…
View article: Optimization of depreciation subsidy policy strategies for electric two-wheelers for improving traffic safety
Optimization of depreciation subsidy policy strategies for electric two-wheelers for improving traffic safety Open
To improve the traffic safety of electric two-wheelers (ETW), China has promulgated ETW standardization policies. This policy requires local governments to take measures to guide the illegal ETWs out of use. Governments have implemented a …
View article: Modeling conflict risk with real-time traffic data for road safety assessment: a copula-based joint approach
Modeling conflict risk with real-time traffic data for road safety assessment: a copula-based joint approach Open
This study proposes a conflict-based traffic safety assessment method by associating conflict frequency and severity with short-term traffic characteristics. Instead of analysing historical crash data, this study employs microscopic trajec…
View article: What Factors Would Make Single-Vehicle Motorcycle Crashes Fatal? Empirical Evidence from Pakistan
What Factors Would Make Single-Vehicle Motorcycle Crashes Fatal? Empirical Evidence from Pakistan Open
The existing research on motorcycle safety has shown that single-vehicle motorcycle crashes (SVMC) account for a higher fatality rate than other types of crashes. Also, motorcycle safety has become one of the critical traffic safety issues…
View article: An assessment of the effect of green signal countdown timers on drivers’ behavior and on road safety at intersections, based on driving simulator experiments and naturalistic observation studies
An assessment of the effect of green signal countdown timers on drivers’ behavior and on road safety at intersections, based on driving simulator experiments and naturalistic observation studies Open
The results suggest that GSCTs worsen safety at signalized intersections, and thus their removal should be considered.
View article: Analysing taxi customer-search behaviour using Copula-based joint model
Analysing taxi customer-search behaviour using Copula-based joint model Open
The drivers of vacant taxis tend to cruise the road network searching new passengers, which leads to additional traffic congestion, air pollution and other problems. This study introduces a Copula-based joint model to analyse destination s…
View article: Sustainable targeted interventions to mitigate the COVID-19 pandemic: A big data-driven modeling study in Hong Kong
Sustainable targeted interventions to mitigate the COVID-19 pandemic: A big data-driven modeling study in Hong Kong Open
Nonpharmaceutical interventions (NPIs) for contact suppression have been widely used worldwide, which impose harmful burdens on the well-being of populations and the local economy. The evaluation of alternative NPIs is needed to confront t…
View article: Safety improvements by intelligent connected vehicle technologies: A meta-analysis considering market penetration rates
Safety improvements by intelligent connected vehicle technologies: A meta-analysis considering market penetration rates Open
As the era of intelligent connected vehicles (ICVs) is approaching, a number of studies have investigated the potential benefits of ICVs, including the safety effects. Although previous studies agree that ICVs would significantly improve t…
View article: How has the injury severity by gender changed after using female dummy in vehicle testing? Evidence from Florida's crash data
How has the injury severity by gender changed after using female dummy in vehicle testing? Evidence from Florida's crash data Open
Previous studies have commonly identified a significant difference in injury severity in traffic crashes by gender. In the United States, using a female dummy had not been mandatory in vehicle testing until 2003 for frontal crashes and 200…
View article: Safety effects of work zone advisory systems under the intelligent connected vehicle environment: a microsimulation approach
Safety effects of work zone advisory systems under the intelligent connected vehicle environment: a microsimulation approach Open
Purpose This study aims to investigate the safety effects of work zone advisory systems. The traditional system includes a dynamic message sign (DMS), whereas the advanced system includes an in-vehicle work zone warning application under t…
View article: Identifying Factors Contributing to the Motorcycle Crash Severity in Pakistan
Identifying Factors Contributing to the Motorcycle Crash Severity in Pakistan Open
Motorcycle is a popular mode of transportation in many developing countries, including Pakistan. Since the last decade, the registered number of motorcycles in Pakistan has increased by six times, constituting 74% of the total registered v…
View article: Sustainable targeted interventions to mitigate the COVID-19 pandemic: A big data-driven modeling study in Hong Kong
Sustainable targeted interventions to mitigate the COVID-19 pandemic: A big data-driven modeling study in Hong Kong Open
Nonpharmaceutical interventions (NPIs) for contact suppression have been widely used worldwide, which impose harmful burdens on the population and the local economy. The evaluation of alternative NPIs is needed to confront the pandemic wit…