Yang Ma- Doctor of Philosophy
- Professor (Associate) at Hefei University of Technology
Yang Ma
- Doctor of Philosophy
- Professor (Associate) at Hefei University of Technology
Generating adverse traffic scenarios of cooperative perception.
About
62
Publications
22,385
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559
Citations
Introduction
Yang's research interests include: road infrastructure digitization, use and development of IT in road and traffic engineering, microscopic traffic simulation, road safety evaluation and improvement.
%Personal Academic Website: http://www.mytransresearch.com.cn (in Chinese & English)
Current institution
Editor roles
Education
April 2021 - March 2022
March 2018 - June 2022
September 2015 - November 2017
Publications
Publications (62)
-Roadside monitoring Lidars (RMLs) will be a crucial part of the future intelligent transportation system. Current approaches for optimizing RMLs' placement at intersections work in hypothetical environments which do not well reflect real-world situations. This article proposes a new virtual method (VM) for optimizing the deployment of RMLs at as-b...
Current approaches for optimizing the placement of roadside LiDAR (RSL) at constructed highways work on handcrafted scenes which fail to precisely map real-world situations. This study proposes a computer-aided framework to address the issue. First, high-accuracy point cloud data are introduced to model the as-built highway infrastructures, based o...
It is anticipated that roadside infrastructure sensing units (ISU) can cooperatively work with intelligent and connected vehicles (ICVs) to perceive traffic scenes more accurately when ICVs increasingly penetrate the market. However, the dynamic occlusion issue may still impair the cooperative vehicle-infrastructure perception capability (CVIPC). T...
Roadside sensing units’ (RSUs) perception capability may be substantially impaired by occlusion issue even they work cooperatively. However, the joint influence of static and dynamic occlusions in real‐life situations remains inadequately considered in optimizing RSUs’ placement. This study proposes a virtual‐real‐fusion simulation (VRFS) framework...
Anger and aggression on the road has been generally considered as one potential contributor to traffic crashes. However, there is a lack of knowledge regarding road anger among cyclists, mainly whether cyclists would express road anger in an aggressive method. This study aimed to adapt the Cycling Anger Expression Inventory (CAX) to the Chinese con...
The design of interchanges is one of the key contents for highway alignment design. The current research on the alignment design of interchange focuses on algorithmic optimization of parameters based on existing scheme design. The use of computers to achieve semi-automated alignment design work still consumes a lot of manpower and resources in the...
Compared to open roads, highway tunnels’ continuous semi-enclosed wall structures exacerbate sight distance challenges for vehicles equipped with automation systems (AV) in curved segments. However, AV’s adaptability to existing road geometry in tunnels, which was primarily tailored for traditional human-driven vehicles, remains inconclusive. There...
Roadside sensing units’ (RSU) field of view is limited. Besides, the static and dynamic occlusions in traffic scenarios may adversely affect the RSU’s perception accuracy. In this case, even multiple RSU can cooperate, the RSU-captured trajectories may deviate from the ground truth and vary with RSU’s placement, thereby impairing RSU’s performance...
Due to road curvature and sensors’ limited field of view, as‐built highway curves would pose an operational challenge to the adaptive cruise control (ACC) system and its shared control. However, very few studies explored the adaptability of ACC system‐dedicated vehicles (V‐ACC) considering the vehicle‐road geometry interaction. Therefore, the objec...
The geometric design of most as-built highways is only prepared for traditional human-driven vehicles while considering very few features of vehicles equipped with automation systems (AV). Furthermore, tunnels, as essential highway infrastructure, are more likely than open roads to cause inadequate available sight distance (ASD) of AV in curved seg...
Epoxy asphalt has excellent fatigue resistance, making it a valuable addition to recycled asphalt mixtures. However, the lack of sufficient understanding of the cracking mechanism in epoxy-modified recycled asphalt mixtures (EMRAM) hinders its widespread application. The purpose of this paper was to investigate the damage and crack characteristics...
Autonomous vehicles (AVs) will gradually supersede human-driven vehicles (HDVs) in the future. Unlike human drivers who perceive their surroundings with their eyes, AV senses the ambient environments based on sensor fusion. More specifically, light detection and ranging (Lidar) sensors, video cameras, and radars are combined to help AV understand t...
Most existing road infrastructures were constructed before the emergence of automated vehicles (AVs) without considering their operational needs. Whether and how AVs could safely adapt to as-built highway geometry are questions that remain inconclusive, and a plausible concern is a challenge from vertical alignments. To fill this gap, this study us...
p>Due to the presence of the road’s curvature and sensors’ limited field of view, as-built highway curves designed based on traditional human-driven vehicles’ characteristics pose a challenge to the adaptive cruise control (ACC) system and its shared control. However, very few efforts in the literature were expended on exploring the adaptability of...
p>Most existing road infrastructures were constructed before the emergence of automated vehicles (AV) without considering their operational needs. Whether and how AV could safely adapt to as-built highway geometry remain inconclusive, and a plausible concern is a challenge from vertical alignments. To fill this gap, this study uses virtual simulati...
The application of epoxy asphalt binder in hot mix plant recycling for reclaimed asphalt pavement (RAP) can significantly increase the utilization rate of waste material on the premise of ensuring the service quality of the asphalt pavement. However, the development of epoxy asphalt binder modified RAP is hindered by the limited understanding of th...
Using a mobile phone while participating in traffic is a growing safety concern all over the world. However, mobile phone use (MPU) while riding an e-bike has not yet been given enough attention by researchers and practitioners. To fill this gap, this study conducted a preliminary online interview and a questionnaire-based survey in China to study...
It is anticipated that vehicles having automation features of Level 0 to Level 5 will coexist in the future. However, many people are unsure what role, if any, human drivers will play at these levels. How do these automation features affect drivers' performances? This article attempts to answer this question by reviewing critical information from h...
Enabling large-scale deployment of automated vehicles (AVs) in the near future requires answering the question firstly: whether AVs could safely adapt to as-built road geometry? This study aims to examine the feasibility of current spiral curve design controls for LiDAR-based AVs (LAVs) from the perspective of the available sight distance (ASD). A...
To summarize the driving adaptability of intelligent vehicles to as-built roadway infrastructures, i.e., the readiness of as-built roadway infrastructures for intelligent vehicles driving, the definition of disconnected intelligent vehicles and the classification of driving automation levels were clarified. On this basis, the differences in human v...
Emerging automated vehicle (AV) technology is being deployed on as-built roadways due to its promising safety improvements. However, realistic problems concerning whether and how perception sensor-based AVs can safely adapt to the existing roadway infrastructures remain to be well addressed due to a lack of consideration of the sensor's angular res...
![Figure 2: Smell device integrated into the VR headset [16].](profile/Said-Easa/publication/363055963/figure/fig2/AS:11431281082952949@1662300223714/Smell-device-integrated-into-the-VR-headset-16_Q320.jpg)
![Figure 3: Interior landscaping of tunnels, China [17].](profile/Said-Easa/publication/363055963/figure/fig3/AS:11431281082972552@1662300251342/nterior-landscaping-of-tunnels-China-17_Q320.jpg)
Paper Published in Ergonomics International Journal: Online communication until now has involved only two of our senses: sight and hearing. However, research is emerging to communicate smell in numerous human-based applications. This paper reviews several general applications of smell, discusses the status of implementing smell to improve road safe...
Enabling large-scale deployment of automated vehicles (AVs) in the near future requires answering the question firstly: whether AVs could safely adapt to as-built road geometry? This study aims to examine the feasibility of current spiral curve design controls for LiDAR-based AVs (LAVs) from the perspective of the available sight distance (ASD). A...
Many people are not aware that autonomous vehicles (AV) have eyes. The height of the driver's eye of a human-driven vehicle (HDV) is crucial in determining the sight distance (SD) needed for safe operation. Likewise, an AV has an electronic eye to scan the environment for safety. This electronic eye is called Lidar (light detection and ranging). El...
The process of pavement deterioration involves uncertainties, and neural networks have been widely used in pavement performance prediction due to their high accuracy. However, the overwhelming majority of current performance prediction models based on neural networks are deterministic. Therefore, this study combined Bayesian theory and neural netwo...
Reliable assessment of the fatigue resistance of asphalt pavement with a long-term service is critically crucial for the rational formulation of original pavement utilization strategies in reconstruction and expansion projects. Currently, the pavement performance evaluation indicators are mainly used to guide pavement preventive maintenance, and it...
Rolling thin film oven (RTFO) has been widely used to simulate the short-term aging of base asphalt. However, owing to that the high-viscosity and high-modulus asphalt binder (HMAB) generally requires a higher temperature to disperse in the aging bottle, there are some doubts about the applicability of the current RTFO aging temperature in the simu...
A new procedure is developed for effectively monitoring intervisibility between conflicting agents in real-time at intersections. Dense light detection and ranging (Lidar) point clouds and time-stamped trajectory data are used to model static intersection environment and emulate traffic participants' dynamic motion states, respectively. The propose...
![Figure 5: Interior landscaping of tunnels, China [39]. In a study of...](profile/Said-Easa/publication/355582471/figure/fig5/AS:1083099635036174@1635242484575/nterior-landscaping-of-tunnels-China-39-In-a-study-of-the-effect-of-tunnel-speed-in_Q320.jpg)
Current highway landscape design guidelines focus only on the visual aspect of the landscape. This paper presents a comprehensive framework for highway landscape planning/design that considers all four senses (vision, sound, touch, and smell). The framework includes advanced technologies, such as electroencephalograms, electromyograms, galvanic ski...
Either quantifying safety level or understanding time-varying traffic risks in non-motorized lanes entails accurate identification of conflict events. Traffic conflict analytics have been widely applied in safety analyses of vehicle-vehicle and vulnerable road users-vehicle interactions at urban intersections. Nevertheless, very limited effort was...
This study proposes a new computer-aided framework for virtually analyzing urban road visibility using mobile laser scanning (MLS) data. The proposed framework compromises three main parts: 1) based on the data reorganization procedure, the 3D U-net is successfully introduced to tackle the issue of non-stationary noises that significantly hinders a...
This is a short demo of virtual scanning method (VSM) proposed in the article ' Virtual Analysis of Urban Road Visibility Using Mobile Laser Scanning Data and Deep Learning'.
Due to a lack of up-to-date and easy-to-update database of vertical clearance (VC) information on as-built large-scale highway infrastructure, it occurs from time to time that some over-height vehicles collide with overhead objects such as overpasses and cause severe casualties and property loss. To address this issue, an automated framework was pr...
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Truck automation is emerging as an innovative technology with benefits in traffic safety and the economy to revolutionize freight traffic. Despite these benefits, the potential negative or positive effects of different driving automation levels (from no automation to full automation) on highway geometry remained to be determined. In this study, dif...
Periodic measurements of sight distance on as-built roads and then removal of sight obstructions are important to guarantee highway safety. This paper proposes an accurate and efficient framework for automated detection of obstacles restricting sight distance on highways using mobile laser scanning (MLS) data. The developed framework is implemented...
The three main elements of autonomous vehicles (AV) are visibility, orientation, and decision. This chapter presents an overview of the implementation of visibility-based technologies and methodologies. The chapter first presents two fundamental aspects that are necessary for understanding the main contents. The first aspect is highway geometric de...
This paper presents a reliability-based method for the design of intersection sight distance (ISD) at traffic roundabouts using the linear and nonlinear deceleration profiles of the entry vehicles. The reliability method is based on the first-order second moment method which is simple and relatively accurate compared with advanced methods. The nonl...
Cycling lane centerlines (CLC) play an important role in the evaluation of safety-related conditions and guiding systems for cyclists along road corridors. The unavailability of design files or undocumented changes in the road infrastructures after improvements has created great difficulty in delineating CLC on existing roads. In this study, mobile...
In recent years, the increasing rate of road crashes involving cyclists with a disproportionate overrepresentation in injury statistics has become a major concern in road safety and public health. However, much remains unknown about factors contributing to cyclists’ high crash rate, especially those related to personal characteristics. This study a...
As vulnerable road users, cyclists are suffering from a disproportionate burden of crash injuries and fatalities. Road anger has been demonstrated as an important precursor of unsafe behaviors and crash-related outcomes for drivers. However, little attention has been paid to road anger experienced by cyclists and less is known about how cyclists' r...
The paper proposes a method supported by MATLAB for detection and measurement of missing point regions (MPR) which may cause severe road information loss in mobile laser scanning (MLS) point clouds. First, the scan-angle thresholds are used to segment the road area for MPR detection. Second, the segmented part is mapped onto a binary image with a p...
This is a demo that shows the fuzzy logic-integrated Social force model (SFM) can help reproduce the mixed non-motorized traffic flow in a mid-block section with roadside obstacles
The purpose of this study is twofold: to construct a model for measuring dynamic available passing sight distance (APSD) during overtaking using light detection and ranging (LiDAR) data, and to investigate the effects of several critical variables on dynamic APSD. The analysis considers a single passed vehicle with several variables, including vehi...
Objective: In the last few decades, the growing popularity of e-bikes in China has raised public concerns regarding an increasing number of fatalities and injuries involving e-bikes. Although previous studies have explored the impacts of personality on driving behaviors of automobile drivers and motorcyclists, little attention has been paid to safe...
This paper aims to introduce the convolutional neural network (CNN) into modeling driver’s visual field (VF) using mobile laser scanning (MLS) data. A new solution that incorporates CNN is proposed to tackle the issues of inefficiency and inadequate manners of visualization in existing methods. The method operates along vehicle trajectory recorded...
High-precision LiDAR data, which provide a rather close fit to the real 3D environment, have been used to conduct computerized estimation of sight distance along existing highways in place of risky cumbersome field measurements. However, so far there is no method for estimating highway sight distance both efficiently and realistically based on high...
Delivery riders (usually e-bike riders employed in delivery industry), an emerging occupation as a result of the booming of online commerce in China, have gained social controversies for the prevalence of unsafe riding and high rates of crash involvement. Given their ever-increasing number and stressful working conditions, more attention should be...
Light Detection and Ranging (LiDAR) data provide rather precise depiction of the real 3D road environment and have been used by some researchers to produce more accurate available sight distance (ASD) results compared with those obtained based on conventional Digital Elevation Models with low-resolution. However, some difficulties exist in existing...
Driving while angry, is also known as “road rage,” the prevalent term describing aggressive behaviors on the road. The paper’s purpose is to translate and revise the propensity for driving angry scale (PADS), to test its reliability and validity among Chinese drivers, to determine whether the PADS can be used appropriately as a tool in Chinese “roa...
Objective: Illegal parking in emergency lanes (paved highway shoulders) is becoming a serious road safety issue in China. The aim of this study was: 1) to examine the utility of the theory of planned behavior (TPB) extended with descriptive norm, past behavior, facilitating and deterring circumstances, sensation seeking and invulnerability in predi...
Countermeasures of safety improvements for rural highways are of great significance to crash reduction and safety enhancement. In order to compare and prioritize the effects of different safety improvement measures with certain quantitative indexes in advance of actual implementation, a theoretically-synthetic evaluation model of effects of traffic...
Poster for TRB paper 'A Novel Real-time Visualization Algorithm for Computing Three-dimensional Sight Distance'
A bus in motion is vulnerable to strong aerodynamic forces that may
interfere with its controllability and operational safety. On mountainous
highways—especially highways along deep gorges—or under extreme
weather conditions, the lateral wind distribution is not always uniform
and consequently produces the Bernoulli effect. The objective of this
st...
The effects of winds are not considered when traditionally determining the minimum highway horizontal radius. Some literature has discussed the direct forces of crosswinds, but the indirect lateral aerodynamic force induced by the Bernoulli effect has been overlooked so far. In this paper, the Bernoulli effect on running vehicles was investigated u...
Questions
Question (1)
Hi,
If a variable is measured by a Likert-point scale (consisting of several Likert items), do the item sores must follow normal distribution so that I can use the mean of these items to represent the variable measured? Because I have recently received a comment on my work, which said that the average of items is only reasonable when the items have the same weight or follow a normal distribution. It is really confusing, because I have seen so many studies using the mean score without considering or reporting normality.
I would really appreciate it if someone could provide some relevant references.
