Transportation, Logistics, and Finance

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Browsing Transportation, Logistics, and Finance by Author "Dehdari Ebrahimi, Zhila"

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    Extending Micromobility Deployments: A Concept and Local Case Study
    (Springer, 2021) Dehdari Ebrahimi, Zhila; Bridgelall, Raj; Momenitabar, Mohsen; Upper Great Plains Transportation Institute
    Micromobility is a recent phenomenon that refers to the use of small human- or electric-powered vehicles such as scooters and bikes to travel short distances, and sometimes to connect with other modes of transportation such as bus, train, or car. Deployments in major cities of the world have been both successful and challenging. This paper reviews the evolution of micromobility services from shared bicycles, dockless systems, and shared electric scooters. The authors evaluated benefits, deficiencies, and factors in adoption to inform more rigorous and extensive geospatial analysis that will examine intersections with land-use, public transit, socio-economic demographics, road networks, and traffic. This work conducted exploratory spatial data analysis and correlation of publicly available datasets on land use, trip production, traffic, and travel behavior. Data from Washington D.C. served as a case study of best practices for scaling deployments to meet the social, economic, and mobility needs of the city.
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    Literature Review of Socioeconomic and Environmental Impacts of High-Speed Rail in the World
    (2021) Momenitabar, Mohsen; Bridgelall, Raj; Dehdari Ebrahimi, Zhila; Arani, Mohammad; Upper Great Plains Transportation Institute
    Countries considering high-speed rail (HSR) developments face enormous challenges because of their high deployment cost, environmental obstacles, political opposition, and their potentially adverse effects on society. Nevertheless, HSR services are importantly sustainable that can have positive and transformative effects on the economic growth of a nation. This paper systematically reviews and classifies impact areas of HSR deployments around the world as well as the analytical methods used to evaluate those impacts. We have utilized the scholarly scientific database to find articles in HSR systems. By defining some rules, we select 116 articles between 1997 and March 2020. The approach revealed interesting patterns and trends in space, time, and sentiment of the analyzed impacts on society, the economy, and the environment. The findings can inform decision-making about HSR developments and deployments, and the gaps identified in the literature can propose new research opportunities for future studies.
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    Remediation Ranking of High Crash Fatality Locations Involving Older Drivers in Florida's Rural Counties
    (2022) Dehdari Ebrahimi, Zhila; Momenitabar, Mohsen; Arani, Mohammad; Bridgelall, Raj; Upper Great Plains Transportation Institute
    In 2019, Florida's aging road users (65 years or older) accounted for 20% of the population but 37% of all crashes. Florida Department of Transportation has identified aging road users as one of the areas that requires attention in achieving Vision Zero--a strategy to eliminate all traffic fatalities and severe injuries, while increasing safe, healthy, equitable mobility for all. Research has documented that fatality rates in motor vehicle crashes are higher in rural than urban areas. Drivers in rural areas may be more vulnerable because they rely more on driving and consequently are reluctant to stop. This study identifies factors contributing to fatalities among aging drivers in 14 rural Florida counties experiencing high crash rates. The methodology used a multicriteria decision-making model, namely the fuzzy analytic hierarchy process (FAHP), to identify and categorize the causes of fatal crashes among drivers aged 65+, and to rank their 14 rural counties for remediation measures. FAHP methodology calculates crash factor weights and ranks the counties using pairwise comparisons of those factors to compare and quantify them. Results revealed that the top contributing factors to fatal crashes among drivers 65+ were cloudy, foggy, or rainy weather and when roadways were sandy or wet. Driving in the dark and at dawn also increased the risk of fatal crashes within this specified age group. These findings could help policy makers in each location focus on remediation measures such as older driver education and infrastructural improvements to address the most critical factors in fatal accidents.