Research
Research Projects
Safe and Efficient Entry Control Facilities
Led research team to evaluate Entry Control Facilities (ECFs) using traffic simulation techniques. Developed ECF simulation models to analyze traffic flow into military installations, and performed calibration and validation to ensure models matched real-world operations. News Article
2023- Present
Traffic Data Analytics Platform Development
Developed the Statewide Mobility Analytics in Real Time (SMART) tool as the lead graduate research assistant of a joint project between the University of Arizona and the Arizona Department of Transportation (ADOT). Developed data collection software, databases for multi-sourced big data, and created the SMART tool dashboard.
2018- 2023
Optimizing Traffic Signals Using Multi-Source Data
Supported a multi-phase project between the City of Tucson and the University of Arizona to optimize traffic signals in the Tucson area. Assisted with developing a data visualization dashboard (tucson.ua-star.org) to assist the city with evaluating roadway performance.
2017 - 2018
Research Publications
Published
Adrian Cottam, Xiaofeng Li, Xiaobo Ma, and Yao-jan Wu (2024). Large-scale Freeway Traffic Volume Estimation using Crowdsourced Speed Data: A Case Study in Arizona. Journal of Transportation Engineering, Part A: Systems. (https://doi.org/10.1061/JTEPBS/TEENG-8304)
Adrian Cottam, Xiaofeng Li, Mohammad Razaur Rahman Shaon, and Yao-jan Wu (2024). Investigating the Impacts of E-Scooters on Bike-sharing System Ridership: A Data-Driven Study in Tucson, Arizona. International Journal of Sustainable Transportation. (https://doi.org/10.1080/15568318.2023.2288122)
Xiaofeng Li, Adrian Cottam, and Yao-Jan Wu (2023). Transit Arrival Time Prediction using Interaction Networks. IEEE Transactions on Intelligent Transportation Systems. (https://doi.org/10.1109/TITS.2023.3238289 )
Xiaoling Luo, Adrian Cottam, Yao-Jan Wu, and Yangsheng Jiang (2021). Hybrid-Data Approach for Estimating Trip Purposes. Transportation Research Record: Journal of the Transportation Research Board. (https://doi.org/10.1177/03611981211018474)
Xiaofeng Li, Adrian Cottam, Yao-Jan Wu, and Alireza Khani (2020). Can a bikesharing system reduce fuel consumption? Case study in Tucson, Arizona. Transportation Research Part D: Transport and Environment. (https://doi.org/10.1016/j.trd.2020.102604)
Xiaofeng Li, Alexander Weber, Adrian Cottam, and Yao-Jan Wu (2019). Impacts of Changing from Permissive/Protected Left-Turn to Protected-Only Phasing. Case Study in the City of Tucson, Arizona. Transportation Research Record: Journal of the Transportation Research Board. (https://doi.org/10.1177/0361198119842108)
Under Review
Adrian Cottam, Xiaofeng Li, and Yao-Jan Wu. VEMLAN: Imputing Missing Data for Failed Freeway Traffic Sensors. – Submitted to Journal of Intelligent Transportation Systems, Pending Review
Adrian Cottam, Xiaofeng Li, and Yao-jan Wu. Machine-Learning Approach for Estimating Passenger Car Equivalent Factors using Crowdsourced Data. - Submitted to Transportmetrica A, First Round of Review.
Adrian Cottam, Xiaofeng Li, and Yao-jan Wu. Investigating Interactions between Sidewalk Autonomous Delivery Robots and Vehicular Traffic at Stop-Controlled Crosswalks. - Submitted to Transportation Research Part F, Pending Review.
Xiaobo Ma, Adrian Cottam, Mohammad Razaur Rahman Shaon, and Yao-Jan Wu (2021). Application of Transfer Learning for Proactive Ramp Metering Performance Assessment. Transportation Research Part A: Policy and Practice. - Under Review
Conference Presentations
Adrian Cottam, Xiaofeng Li, and Yao-Jan Wu. Machine-Learning Approach for Estimating Passenger Car Equivalency Factors using Crowdsourced Data. Presented at the 103rd Annual Meeting of the Transportation Research Board in Washington, DC.
Adrian Cottam, Xiaofeng Li, Cynthia Navarro, and Yao-Jan Wu. Investigating Interactions between Sidewalk Autonomous Delivery Robots and Vehicular Traffic at Stop-Controlled Crosswalks. Presented at the 103rd Annual Meeting of the Transportation Research Board in Washington, DC.
Xiaobo Ma, Adrian Cottam, Mohammad Razaur Rahman Shaon, and Yao-Jan Wu. Application of Transfer Learning for Proactive Ramp Metering Performance Assessment. Presented at the 103rd Annual Meeting of the Transportation Research Board in Washington, DC.
Adrian Cottam, Xiaofeng Li, and Yao-Jan Wu (2023). VEMLAN: Imputing Missing Data for Failed Freeway Traffic Sensors. Presented at the 102nd Annual Meeting of the Transportation Research Board in Washington, DC.
John Roberts, Adrian Cottam (2022). Beyond Rush Hour: Using Ramp Metering and Event-Based Data for Incident Response. Presented at the 29th ITS Arizona Annual Conference in Mesa, AZ.
Adrian Cottam, Xiaobo Ma, Yong Ge, and Yao-jan Wu. Spatial Transferability of Volume Estimation Models: A Multi-Model Analysis with Spatial Embedding. Presented at the 101st Annual Meeting of the Transportation Research Board Eisenhower Scholars Poster Session in Washington, DC.
Steven Cheshko, Adrian Cottam (2021). Adapting to a Pandemic: Ramp Metering with Changing Traffic Patterns. Presented at the 2021 ITS Arizona 28th Annual Conference.
Adrian Cottam, Xiaobo Ma, Xiaofeng Li, and Yao-jan Wu (2021). Large-scale Freeway Traffic Volume Estimation using Crowdsourced Speed Data: A Case Study in Arizona. Presented at the 100th Annual Meeting of the Transportation Research Board in Washington, DC.
Adrian Cottam, Xiaofeng Li, Mohammad Razaur Rahman Shaon, and Yao-jan Wu (2021). Investigating the Impacts of E-Scooters on Bike-sharing System Ridership: A Data-Driven Study in Tucson, Arizona. Presented at the 100th Annual Meeting of the Transportation Research Board in Washington, DC.
Yang Liang, Xiaoqing Zeng, Xiaofeng Li, Adrian Cottam, and Yao-Jan Wu (2020). Quantifying Mobility Impact of Pedestrian Hybrid Beacon Signal on Arterial Traffic: Case Study in Tucson, Arizona. Presented at the 99th Annual Meeting of the Transportation Research Board in Washington, DC.
Xiaofeng Li, Alexander Weber, Adrian Cottam, and Yao-Jan Wu (2019). Impacts of Changing from Permissive/Protected Left-Turn to Protected-Only Phasing. Case Study in the City of Tucson, Arizona. Presented at the 98th Annual Meeting of the Transportation Research Board in Washington, DC.
Adrian Cottam (2018). Effects of Street Lighting on the Severity of Vulnerable Road User Crashes. Presented at the 2018 COTA-ISETT conference in Honolulu, HI.