Divyakant Tahlyan

Ph.D. Candidate. Northwestern University.

Northwestern University

Transportation Center

600 Foster Street

Evanston, Illinois 60208

I am a PhD Candidate at the Northwestern University's Transportation Systems Analysis and Planning Program in the Department of Civil and Environmental Engineering. I am currently working at the Transportation Center as a graduate research assistant under the supervision of Prof. Hani Mahmassani. I am interested and have strong skills in analyzing data, building machine learning and econometric models and using these to understand and solve transportation problems.

Research Interests

  • Statistical, econometric and machine learning methods for transportation data analysis: discrete choice and ordered response models, integrated choice and latent variable models, count data models, heterogeneity and hierarchical models, structural equation modeling, latent class and latent transition analysis, machine learning based classifiers (SVM, neural networks, decision trees) and ensemble learning.

  • Social networks and travel: Egocentric network data collection and synthetic social network generation, social capital measurement, dimensions and impact on activity participation.

  • Route choice modeling: choice set generation algorithms, truck route choice, use of large scale passive data sources

  • Crash data analysis: frequency and severity modeling and prediction, zero-inflated and limited dependent variable models, unobserved heterogeneity and hierarchical models, spatial transfer-ability and temporal instability.

  • ICT and travel: role of perceptions, attitudes, experiences, constraints and satisfaction on tele-activities adoption and future retention, virtual/physical activity interaction, tele-activity and well-being.


Jan 13, 2022 My slides and poster from the 2022 TRB Annual Meeting are now online.
Dec 10, 2021 Paper of understanding telework satisfaction during the COVID-19 pandemic is published. [doi]
Dec 7, 2021 I was featured in TGS Spotlight series by The Graduate School at Northwestern. Read here.
Sep 4, 2021 I was awarded the Northwestern University Transportation Center’s Dissertation Year Fellowship.
Sep 3, 2021 Paper on characterizing visitor behavior using sequence alignment clustering is published. [doi]
Aug 24, 2021 Paper on simulating large-scale events using a network of heterogeneous queues is published. [doi]
May 2, 2021 I was awarded the 2021 T&DI Bob Camillone Memorial Scholarship by ASCE Illinois Section.

selected publications

  1. For whom did telework not work during the Pandemic? understanding the factors impacting telework satisfaction in the US using a multiple indicator multiple cause (MIMIC) model
    Tahlyan, Divyakant, Said, Maher, Mahmassani, Hani, Stathopoulos, Amanda, Walker, Joan, and Shaheen, Susan
    Transportation Research Part A: Policy and Practice 2022
  2. Characterizing visitor engagement behavior at large-scale events: Activity sequence clustering and ranking using GPS tracking data
    Abkarian, Hoseb, Tahlyan, Divyakant, Mahmassani, Hani, and Smilowitz, Karen
    Tourism Management 2022
  3. Simulating Large-Scale Events as a Network of Heterogeneous Queues: Framework and Application
    Cummings, Christopher, Abkarian, Hoseb, Zhou, Yuhan, Tahlyan, Divyakant, Smilowitz, Karen, and Mahmassani, Hani S.
    Transportation Research Record 2021