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Amin Azimian
School of Architecture, The University of Texas at Austin, Austin, TX 78712, USA

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Journal article
Published: 04 July 2021 in Sustainability
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Roundabouts are considered as one of the most efficient forms of intersection that substantially reduce the types of crashes that result in injury or loss of life. Nevertheless, they do not eliminate collision risks, especially when human error plays such a large role in traffic crashes. In this study, we used a driving simulator and an eye tracker to investigate drivers’ eye movements under cell phone-induced distraction. A total of 45 drivers participated in two experiments conducted under distracted and non-distracted conditions. The results indicated that, under distracting conditions, the drivers’ fixation duration decreased significantly on roundabouts, and pupil size increased significantly.

ACS Style

Amin Azimian; Carlos Catalina Ortega; Juan Espinosa; Miguel Mariscal; Susana García-Herrero. Analysis of Drivers’ Eye Movements on Roundabouts: A Driving Simulator Study. Sustainability 2021, 13, 7463 .

AMA Style

Amin Azimian, Carlos Catalina Ortega, Juan Espinosa, Miguel Mariscal, Susana García-Herrero. Analysis of Drivers’ Eye Movements on Roundabouts: A Driving Simulator Study. Sustainability. 2021; 13 (13):7463.

Chicago/Turabian Style

Amin Azimian; Carlos Catalina Ortega; Juan Espinosa; Miguel Mariscal; Susana García-Herrero. 2021. "Analysis of Drivers’ Eye Movements on Roundabouts: A Driving Simulator Study." Sustainability 13, no. 13: 7463.

Journal article
Published: 04 June 2021 in Journal of Transport Geography
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Measuring spatial accessibility to grocery stores and identifying food deserts have been of interest to planners and policy makers. However, measuring and quantifying accessibility in a way that relates to actual travel behaviors and preferences are challenging. This study aims to promote an existing radiation model by incorporating different transportation modes and time use diaries to provide a more realistic estimation of accessibility. We proposed a survival analysis method, such as the Cox proportional hazard model, as a novel approach to develop a cost decay function based on time use diaries. A multinomial logit model was applied to estimate the portion of people walking, traveling by car, and traveling by bus. A case study of grocery stores in Travis County, Texas, is used to illustrate the approach. The results indicate that for walking accessibility to grocery stores, the majority of zip codes fall into the very low, low, and moderate accessibility classes. Moreover, in most western zip codes transit accessibility to grocery stores is found to be very low. However, the spatial accessibility for some of such zip codes has been enhanced because of the presence of cars.

ACS Style

Junfeng Jiao; Amin Azimian. Measuring accessibility to grocery stores using radiation model and survival analysis. Journal of Transport Geography 2021, 94, 103107 .

AMA Style

Junfeng Jiao, Amin Azimian. Measuring accessibility to grocery stores using radiation model and survival analysis. Journal of Transport Geography. 2021; 94 ():103107.

Chicago/Turabian Style

Junfeng Jiao; Amin Azimian. 2021. "Measuring accessibility to grocery stores using radiation model and survival analysis." Journal of Transport Geography 94, no. : 103107.

Research article
Published: 03 May 2021 in Transportation Letters
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The COVID-19 outbreak significantly disrupted urban mobility across the world and affected people’s travel behaviors. This paper aims to explore the relationship between socio-demographic and health factors and changes in travel behavior during the second phase of this outbreak. We proposed two measures to assess these changes: (i) whether an individual reduced the number of trips to stores during the second phase of the pandemic and (ii) whether an individual reduced the number of trips by public transport during this period. Two binary logit models were estimated based on survey data from the United States Census Bureau. The results indicate that all variables, including age, gender, educational status, marital status, work loss, difficulty with expenses, household size, work type, income, health status, and anxiousness were significantly associated with changes in travel behavior.

ACS Style

Junfeng Jiao; Amin Azimian. Exploring the factors affecting travel behaviors during the second phase of the COVID-19 pandemic in the United States. Transportation Letters 2021, 13, 331 -343.

AMA Style

Junfeng Jiao, Amin Azimian. Exploring the factors affecting travel behaviors during the second phase of the COVID-19 pandemic in the United States. Transportation Letters. 2021; 13 (5-6):331-343.

Chicago/Turabian Style

Junfeng Jiao; Amin Azimian. 2021. "Exploring the factors affecting travel behaviors during the second phase of the COVID-19 pandemic in the United States." Transportation Letters 13, no. 5-6: 331-343.