Divyakant Tahlyan

Ph.D. Candidate. Northwestern University.

Northwestern University

Transportation Center

600 Foster Street

Evanston, Illinois 60208

Click Here To Read My Northwestern Graduate School Spotlight Interview

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. My research focuses on enabling safe, smart, sustainable, resilient and equitable transportation systems.

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), ensemble learning, and causal inference.

  • 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.

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

  • Transportation sector electrification: Resilience and evacuation planning, transportation interaction with energy.

  • Sustainability and equity: Micro- and shared mobility, well-being, reducing car dependence, accessibility.

  • 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.

news

Jun 5, 2022 Paper on understanding relationship between different social capital dimensions and urban activity participation is published. doi
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]

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. [Open Access] Disentangling social capital – Understanding the effect of bonding and bridging on urban activity participation
    Tahlyan, Divyakant, Stathopoulos, Amanda, and Maness, Michael
    Transportation Research Interdisciplinary Perspectives 2022