Browsing 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 ... -
Assessment of turn signal use at two-lane roundabouts in Doha city
Deepti, Muley; Dias, Charitha; Umlai, Al-Harith; AlArdah, Husam; Shah, Mohammad; Murtaza, Mohammad; Abou-sido, Firas... more authors ... less authors ( Elsevier B.V , 2022 , Conference Paper)Turn signal and lane change indicators can be identified as an effective way for drivers to communicate with each other. Additionally, the use of turn signals has significant safety implications. This study explored the ... -
COVID 19 PANDEMIC: IMPACTS AND FUTURE IMPLICATIONS ON PERSONAL TRAVEL BEHAVIOR IN THE STATE OF QATAR
Alhajyaseen, Wael; Hussain, Qinaat; Kharbeche, Mohamed; Dias, Charitha ( Qatar University Press , 2020 , Poster)In December 2019, a novel and contagious coronavirus also known as Covid-19 outbroke in Wuhan, China. In response to the virus, many countries implemented strict travel restrictions and lockdowns to hold back the spread ... -
Crowd Evacuation through Crossing Configurations: Effect of Crossing Angles and Walking Speeds on Speed Variation and Evacuation Time
SayedMohammed, Shabna; Verma, Anshi; Dias, Charitha; Alhajyaseen, Wael; Almukdad, Abdulkarim; Aghabayk, Kayvan... more authors ... less authors ( Multidisciplinary Digital Publishing Institute (MDPI) , 2022 , Article)The design of safe and efficient pedestrian facilities necessitates the knowledge of complex human movements, such as intersecting pedestrian streams, under different conditions. This study aims to experimentally investigate ... -
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 ... -
Exploratory study on self-awareness and self-preparedness of Malaysian rail passengers for emergency evacuations
Noorhazlinda, Abd Rahman; Johari, Muhammad Syahir Mohd; Dias, Charitha ( Elsevier Ltd. , 2022 , Article)This study explores the self-awareness and self-preparedness among Malaysian rail passengers during potential emergency evacuations. A questionnaire survey was carried out at a major rail transit terminal in Kuala Lumpur, ... -
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 ... -
Exploring the impacts of COVID-19 on travel behavior and mode preferences
Abdullah, Muhammad; Dias, Charitha; Muley, Deepti; Shahin, Md. ( ElsevierLtd. , 2020 , Article)Various measures were recommended or imposed by the governments to control the spread of COVID-19. Travel behaviors are significantly influenced due to such measures. However, people have various travel needs ranging from ... -
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, ... -
Mega Events and Crowd Evacuation at Tourist Attractions: A Case Study of Souq Waqif using Pedestride Crowd Simulation Tool
Abdelaal, Ali; Dias, Charitha; Sarvi, Majid; Alhajyaseen, Wael; Tarlochan, Faris ( Qatar University Press , 2020 , Poster)Evacuating individuals at large gathering places can be achieved safely and efficiently through the detailed understanding of crowd dynamics within a certain location. Souq Waqif is a major tourist attraction in Qatar that ... -
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 ... -
Pedestrians’ Microscopic Walking Dynamics in Single-File Movement: The Influence of Gender
Dias, Charitha; Abdullah, Muhammad; Ahmed, Dawood; Subaih, Rudina ( MDPI , 2022 , Article)Demographics of individuals could largely influence their behaviors and interactions with surrounding pedestrians. This study investigates the influence of pedestrians’ gender on microscopic walking dynamics of single-file ... -
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 ... -
Role of transport during outbreak of infectious diseases: Evidence from the past
Muley, Deepti; Shahin, Md; Dias, Charitha; Abdullah, Muhammad ( MDPI , 2020 , Article Review)The outbreak of infectious diseases affects people's lifestyles significantly, as they undertake fewer outdoor activities as a protective measure and to follow government orders of restricted movements. This paper reviewed ...