Browsing Traffic Safety by Author "Dias, Charitha"
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Are Professional Drivers more Aggressive than General Drivers? A Case Study from Doha, Qatar
Dias, Charitha; Kharbeche, Mohamed; Muley, Deepti; Kashem, Abdurahman; AbulFahed, Mohammed; Iral, Sam Verniel; Abdelfattahb, Nooreldeen... more authors ... less authors ( Elsevier B.V. , 2022 , Conference Paper)Previous studies have revealed that aggressive and reckless driving can largely affect the occurrence and severity of road crashes. There could be intentional aggressive and unsafe acts, which could significantly affect ... -
Defensive or competitive Autonomous Vehicles: Which one interacts safely and efficiently with pedestrians?
Hong, Zhu; Alhajyaseen, Wael; Iryo-Asano, Miho; Nakamura, Hideki; Dias, Charitha ( Elsevier , 2022 , Article)The emergence of Autonomous Vehicles (AVs) could provoke unexpected challenges in urban traffic environments. One such crucial challenge is the conflicts between pedestrians and AVs, particularly on unsignalized mid-block ... -
Effect of U-turns and heavy vehicles on the saturation flow rates of left-turn lanes at signalized intersections
Abuhijleh, Abdelrahman; Dias, Charitha; Alhajyaseen, Wael; Muley, Deepti ( MDPI , 2020 , Article)© 2020 by the authors. The Saturation Flow Rate (SFR) is a primary measure that can be used when estimating intersection capacity. Further, the efficiency of signal control parameters also depends on the accuracy of assumed ... -
Exploring Crowd Management and Evacuation Strategies using Microscopic Pedestrian Simulation: A Case Study of Souq Waqif
Mohammed, Shabna Sayed; Dias, Charitha; Alhajyaseen, Wael; Alqaradawi, Mohammed Yousef ( Qatar University Press , 2023 , Conference Paper)Safe egress plans are critical for crowd evacuation at touristic attractions, particularly during special events, as visitors are often unaware of their options. Identification of bottlenecks in the walking spaces are vital ... -
Exploring Microscopic Characteristics of Bicycle Riders’ following Behaviors in a Single-File Movement
Dias, Charitha; Abdullah, Muhammad; Hussain, Qinaat; Salehi, Ahmad Mohammadtayeb; Nishiuchi, Hiroaki ( MDPI , 2023 , Article)Cycling can bring a wide range of social, economic, and health benefits to individuals and communities. The safety and efficiency of bicycle facilities can be significantly impacted by the interactions among riders. This ... -
Improved traffic safety at work zones through animation-based variable message signs
Almallah, Mustafa; Hussain, Qinaat; Alhajyaseen, Wael K.M.; Pirdavani, Ali; Brijs, Kris; Dias, Charitha; Brijs, Tom... more authors ... less authors ( Elsevier Ltd , 2021 , Article)Work zones are established to provide a safe environment for all road users and road workers. However, based on the statistics, they can be considered as crash prone zones due to changes in the road alignments and the ... -
Interactions between autonomous vehicles and pedestrians at unsignalized mid-block crosswalks considering occlusions by opposing vehicles
Zhu, Hong; Iryo-Asano, Miho; Alhajyaseen, Wael K.M.; Nakamura, Hideki; Dias, Charitha ( Elsevier Ltd , 2021 , Article)Visibility can be identified as one of the critical determinants for the safety performance of autonomous vehicles (AVs) on unsignalized mid-block crosswalks (UMC), which may be significantly influenced by build-up environment ... -
Lane-based analysis of the saturation flow rate considering traffic composition
Mohammad, Anas A.; Al Nawaiseh, Hazem M.; Alhajyaseen, Wael K.; Dias, Charitha; Mehran, Babak ( Informa UK Limited - Taylor & Francis , 2023 , Article)Saturation flow rate (SFR) is an essential metric for estimating the capacities of signalized intersections. Many factors, including traffic composition, configuration and geometry of the intersection, and driver behavior, ... -
Modeling Trajectories and Trajectory Variation of Turning Vehicles at Signalized Intersections
DIas, Charitha; Iryo-Asano, Miho; Abdullah, Muhammad; Oguchi, Takashi; Alhajyaseen, Wael ( Institute of Electrical and Electronics Engineers , 2020 , Article)© 2013 IEEE. Information on the trajectories of turning vehicles at signalized intersections can be used in numerous applications, such as movement planning of autonomous vehicles, realistic representation of surrounding ... -
Motorcyclists’ Safety on Expressways: Subjective and Objective Evaluations
Suzuk, Koji; Alhajyaseen, Wael K. M.; Imada, Kazuki; Dias, Charitha ( Springer Berlin Heidelberg , 2019 , Article)This study objectively and subjectively investigates the factors influencing motorcyclists’ safety on expressways. The relationships between motorcyclist stress while driving on expressways and potential influencing factors ... -
Pedestrian flow characteristics through different angled bends: Exploring the spatial variation of velocity
Hannun, Jamal; Dias, Charitha; Taha, Alaa Hasan; Almutairi, Abdulaziz; Alhajyaseen, Wael; Sarvi, Majid; Al-Bosta, Salim... more authors ... less authors ( Public Library of Science (PLOS) , 2022 , Article)Common geometrical layouts could potentially be bottlenecks, particularly during emergency and high density situations. When pedestrians are interacting with such complex geometrical settings, the congestion effect might ... -
Road Crossing at Unmarked Mid-Block Locations: Exploring Pedestrians’ Perception and Behavior
Abdullah, Muhammad; Dias, Charitha; Oguchi, Takashi ( Springer , 2022 , Article)Violations, risky behaviors and perceptions may largely contribute to crashes involving pedestrians, particularly at unmarked mid-block locations. The likelihood and severity of crashes at mid-block locations are higher ... -
Safety Analysis of Merging Vehicles Based on the Speed Difference between on-Ramp and Following Mainstream Vehicles Using NGSIM Data
Hussain, Qinaat; Dias, Charitha; Al-Shahrani, Ali; Hussain, Intizar ( Multidisciplinary Digital Publishing Institute (MDPI) , 2022 , Article)Highway merging points are critical elements due to the interactions between merging vehicles and following vehicles on the outermost lane of the highway stream. Such interactions could have significant implications for ...