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Projects and Publications

Taxi Event Extractor (TEE) 

Airport Speed Heatmap
Airport surface performance uses gate times (gate-out/in) and wheels-on/off times from publicly-available datasets.  The TEE extracts flight-level metrics from surveillance data, including taxi speed, distance and the location/time of additional events of interest.
TEE Manual March 2023.pdf

Mirmohammadsadeghi, N.*, Hotle, S., Trani, A., & Gulding, J. (2020). Taxi Event Extraction from Surveillance for Surface Performance Evaluation. Journal of Air Transportation28(2), 28-35. 

Li, M.* & Hotle, S. (2020). Evaluation of Taxiing Behavior by Airport and Flight Characteristics. AIAA AVIATION 2020 FORUM (p. 2883).

Aviation Delay Analysis and Operational Metrics

Flight Map Across United States
Delay can occur at any point during a flight and can propagate to flights later in the day.  The National Aerospace System (NAS) is interconnected and linking delays to exact causal factors is complex.

Alsalous, O.*, & Hotle, S. (2023). Deicing Facility Capacity and Delay Estimation Using ASDE-X Data: Chicago O’Hare Simulation Case Study. Transportation Research Record, 03611981231185147.

Atallah, S.*, & Hotle, S. (2022). Evaluation of Airport Size and Delay Causal Factor Effects on Delay Propagation Dissipation. Transportation Research Record2676(3), 608-620.

Alsalous, O.*, & Hotle, S. (2021). Modeling Arrival Flight Times within the Terminal Airspace. Transportation Research Record (No. TRBAM-21-03335). 

Impact of Adverse Events on Transportation Systems and Behavior

Airplane in bad weather
Major events impact transportation systems for indefinite periods of time.  Whether it is a pandemic, extreme weather system or recession, insight into human behavior during these events can aid in system recovery.

Kaplan, M.*, Hotle, S., & Heaslip, K. (2023). How has COVID-19 impacted customer perceptions and demand for delivery services: An exploratory analysis. Transport Policy.

Hotle, S., & Mumbower, S. (2021). The Impact of COVID-19 on Domestic US Air Travel Operations and Commercial Airport service. Transportation Research Interdisciplinary Perspectives9, 100277.

Murray-Tuite, P., & Hotle, S. (2020). How Do Parents Manage Symptomatic Children? Social-Distancing Insights for COVID-19 and Seasonal Influenza. Journal of Human Behavior in the Social Environment, 1-24. 

Hotle, S., Murray-Tuite, P., & Singh, K.* (2020). Influenza Risk Perception and Travel-Related Health Protection Behavior in the US: Insights for the Aftermath of the COVID-19 Outbreak. Transportation Research Interdisciplinary Perspectives, 100127. 

Hajhashemi, E.*, Murray-Tuite, P. M., Hotle, S. L., & Wernstedt, K. (2019). Using Agent-Based Modeling to Evaluate the Effects of Hurricane Sandy’s Recovery Timeline on the Ability to work. Transportation Research Part D: Transport and Environment, 77, 506-524. 

Atallah, S.*, Hotle, S. (2019). Assessment of Contributing Factors to Air Service Loss in Small Communities. Transportation Research Record, Vol. 2673(6), pp. 598-606. 

Atallah, S.*, Hotle, S., and Mumbower, S. (2018). The Evolution of Low-Cost Carrier Operational Strategies Pre- and Post-Recession. Journal of Air Transport Management, Vol. 73. Pgs. 87-94. 

Urban Air Mobility (UAM)

UAM Flight Path
UAM is an emerging technology, where travelers will use Vertical and Take-Off Landing (VTOL) aircraft to arrive to their destination in a fraction of the time.  Before implementation, customer demand and feasibility of the system has to be researched.

Rimjha, M.*, Hotle, S., Trani, A., & Hinze, N. (2022, April). Impact of Airspace Restrictions on Urban Air Mobility Commuter Demand Potential. In 2022 Integrated Communication, Navigation and Surveillance Conference (ICNS) (pp. 1-12). IEEE.

Rimjha, M.*, Hotle, S., Trani, A., Hinze, N., & Smith, J. (2021). Urban Air Mobility Demand Estimation For Airport Access: A Los Angeles International Airport Case Study. 2021 Integrated Communications Navigation and Surveillance Conference (ICNS).

Rimjha, M.*, Hotle, S. & Trani, A. (2021). Commuter Demand Estimation and Feasibility Assessment for Urban Air Mobility in Northern California. Transportation Research Part A: Policy and Practice.

Tarafdar, S., Rimjha, M.*, Hotle, S., & Trani, A. (2019). Urban Air Mobility Regional Landing Site Feasibility and Fare Model Analysis in the Greater Northern California Region,” 2019 Integrated Communication, Navigation, & Surveillance Conference, Herndon, VA.

Engineering Education 

Flipped Classroom Learning
Which teaching styles help engineers learn best?  What job-related factors do engineers consider when deciding their career path?  Survey-based studies help us teach and advise the next generation of engineers.

Hotle, S.L. and Katz, B.J. (2018). Decision Support for Civil Engineering Students: An Analysis of Alumni Career Paths. Transportation Research Record.

Hotle, S. and Garrow, L.A. (2016). Effects of the Traditional and Flipped Classrooms on Undergraduate Student Opinions and Success. Journal of Professional Issues in Engineering Education and Practice.