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Maksym Diachuk and Said M. Easa
The paper presents a technique of motion planning for autonomous vehicles (AV) based on simultaneous trajectory and speed optimization. The method includes representing the trajectory by a finite element (FE), determining trajectory parameters in Frenet ...
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Yanqun Yang, Yu Wang, Said M. Easa and Xinyi Zheng
This study investigated drivers? perceptions of pedestrian crossing behavior at unsignalized crosswalks, which was less fruitful in quantitative and qualitative traffic research. Subjective and snow-ball sampling were used to conduct semi-structured in-d...
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Miao Lin, Changbin Hu, Said M. Easa and Zhenliang Jiang
Premature damage to heavy-duty pavement has been found to be significantly caused by the vehicle?highway alignment interaction, especially in mountainous regions. This phenomenon was further verified by field pavement damage investigations and field test...
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Said M. Easa, Ahmed A. Lamri and Dejan Brkic
Numerous explicit approximations of the Colebrook equation have been developed and evaluated based on two criteria: prediction accuracy and computational efficiency. This paper introduces a new evaluation criterion based on the reliability of each equati...
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Abayomi Afolayan, Said M. Easa, Oladapo S. Abiola, Funmilayo M. Alayaki and Olusegun Folorunso
This study identified high-risk locations (hotspots) using geographic information systems (GIS) and spatial analysis. Five years of accident data (2013?2017) for the Lokoja-Abuja-Kaduna highway in Nigeria were used. The accident concentration analysis wa...
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Tran Anh Dung and Said M. Easa
Previous studies have addressed railway turnouts (switches and crossings), but research on the performance of 1000 mm gauge turnouts is limited. At present, wooden sleeper structures are used at turnouts in Vietnam. However, these structures have many di...
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Said M. Easa, Yang Ma, Shixu Liu, Yanqun Yang and Shriniwas Arkatkar
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 secon...
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Said M. Easa and Maksym Diachuk
In passing maneuvers on two-lane highways, assessing the needed distance and the potential power reserve to ensure the required speed mode of the passing vehicle is a critical task of speed planning. This task must meet several mutually exclusive conditi...
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Maksym Diachuk, Said M. Easa and Joel Bannis
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Said M. Easa and Wai Yeung Yan
Traditional design approaches in civil engineering mainly focus on codes/guidelines related to building an infrastructure, while performance-based analysis (PBA), an emerging new reality around the world, focuses on the performance of the end product. Pr...
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