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Research

   Group

Every transportation system is ultimately a human system. The choices people make about how, when, and where to travel, and how they behave on the road, shape safety, mobility, and the communities these systems serve. At MATSH, we bring together advanced econometric modeling, machine learning, and quantitative analysis to understand these choices and their consequences. We develop modeling frameworks that capture the complexity of real-world data, including differences across people and places, changes over time, and links between related outcomes, to generate evidence that advances safety analysis, improves mobility, and supports transportation decisions that strengthen communities.

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Tanmoy Bhowmik, Ph.D.

Assistant Professor

Dept. of Civil and Environmental Engineering

Portland State University

Email: tbhowmik@pdx.edu

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Dr. Tanmoy Bhowmik is an Assistant Professor of Civil and Environmental Engineering at Portland State University, where he leads the MATSH Research Group. He earned his M.S. (2018) and Ph.D. (2020) in Civil Engineering from the University of Central Florida, where he also served as a postdoctoral scholar. His research develops advanced econometric and data-driven models to understand human behavior in transportation planning, safety, and emerging technologies.

Recent News and Events

  • New Project! MATSH received a Portland State University Faculty Development Grant for Incentives or Constraints? A Behavioral Analysis of Push and Pull Transportation Policies. 

  • TRB 2027! Two MATSH papers have been accepted at the 106th TRB Annual Meeting

  • New publication! Our latest study in Analytic Methods in Accident Research develops an integrated modeling framework to jointly analyze the frequency and severity of risky driving crashes across geographic zones.

  • New Project! The MATSH Research Group is leading a USDOT/PacTrans-funded project to develop SafeSpot, a crowdsourced platform for reporting traffic near-misses and roadway hazards.

  • New Project! The MATSH Research Group is partnering on TCRP A-54, a national research project evaluating transit fare enforcement strategies and their impacts on ridership, costs, and safety.

  • TRB 2026! MATSH presented five papers at the 105th TRB Annual Meeting, covering vehicle weight mismatch, aggressive driving, emergency medical services, temporal instability, and risky driving.

  • Award! Congratulations to MATSH alumnus Pabitra Kumar Roy on winning 3rd place in the 2026 ASA Transportation Statistics Interest Group Student Paper Competition!

  • Congratulations! Pabitra Kumar Roy became the first M.S. graduate of MATSH Group.​

  • New publication! Our latest study in Analytic Methods in Accident Research applies a latent segmentation approach to examine how temporal changes in driver injury severity vary across different segments of the driving population.

  • New publication! Our latest study in Analytic Methods in Accident Research introduces a joint count and generalized ordered fractional split approach for capturing temporal instability in road safety analysis.

Contact Information

Maseeh College of Engineering and Computer Science
Civil and Environmental Engineering

Portland State University

1930 SW 4th Ave # 500, Portland, 
Portland, OR 97201-0751

Office: EB 301E
Phone: 503-725-7096
Email: tbhowmik@pdx.edu

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