Summary
Academic Background
PhD
(Transportation Engineering) University of Tennessee - Knoxville
September 02, 2019 - December 10, 2021
Honours and Awards
Publications
How mode of evacuation, roadway environment, and traffic conditions relate to injury severity score? Untangling the role of pre-hospital time in road crashes
October 01, 2025
Injury - Volume:56, Issue:10, Article Number 112668
Empirical Analysis to Investigate the Factors Influencing the Installation of Recharging Infrastructure for Commercial Electric Fleet
February 11, 2025
Arabian Journal for Science and Engineering - Pages 1-15
Exploring the influence of rider age and experience on motorcycle crash risk: Evidence from a case-control study
January 19, 2025
Journal of Transportation Safety and Security -
The role of human errors and violations in pedestrian-related crashes: Harnessing a unique database and accounting for heterogeneity
December 01, 2024
Journal of Safety Research - Volume:91, Pages 136-149
Understanding the role of driver behaviors and performance in safety-critical events: Application of machine learning
July 15, 2024
Journal of Transportation Safety & Security - Pages: 40
Feasibility of utilizing recycled concrete aggregate blended with waste tire rubber and drywall waste as pavement subbase material
April 30, 2024
Journal of Material Cycles and Waste Management - Volume 26(4), Pages 2278-2293
On the need to address fixed-parameter issues before applying random parameters: A simulation-based study
March 01, 2024
Analytic Methods in Accident Research - Volume 41, Article Number 100314
Exploring the Effect of Visibility Factors on Vehicle–Pedestrian Crash Injury Severity
November 01, 2023
Transportation Research Record - Volume 2677, Issue 11, Pages 24-35
How is the duration of distraction related to safety–critical events? Harnessing naturalistic driving data to explore the role of driving instability
June 16, 2023
Journal of Safety Research - Volume 85, Pages 15-30
Exposure of road users to the traffic noise in urban environment: insights from a mega metropolitan city
April 10, 2023
International Journal of Environmental Science and Technology - Pages 1-10
Copula-based bivariate count data regression models for simultaneous estimation of crash counts based on severity and number of vehicles
March 01, 2023
Accident Analysis and Prevention - Volume 181, Article Number 106928
Heterogeneous ensemble learning for enhanced crash forecasts – A frequentist and machine learning based stacking framework
February 01, 2023
Journal of Safety Research - Volume 84, Pages 418-434
Exploring pathways from driving errors and violations to crashes: The role of instability in driving
January 01, 2023
Accident Analysis and Prevention - Volume 179, Article Number 106876
Toward better measurement of traffic injuries – Comparison of anatomical injury measures in predicting the clinical outcomes in motorcycle crashes
February 01, 2022
Journal of Safety Research - Volume 80, Pages 175-189
Understanding how relationships between crash frequency and correlates vary for multilane rural highways: Estimating geographically and temporally weighted regression models
July 01, 2021
Accident Analysis and Prevention - Volume 157, Article Number 106146
Built environment, driving errors and violations, and crashes in naturalistic driving environment
July 01, 2021
Accident Analysis and Prevention - Volume 157, Article Number 106158
A taxonomy of driving errors and violations: Evidence from the naturalistic driving study
March 01, 2021
Accident Analysis and Prevention - Volume 151, Article Number 105873
Injury severity analysis of pedestrian and bicyclist trespassing crashes at non-crossings: A hybrid predictive text analytics and heterogeneity-based statistical modeling approach
February 01, 2021
Accident Analysis and Prevention - Volume 150, Article Number 105835
Is Effective Enforcement of Seatbelt Law Helpful in Reduction of Road Crash Fatalities: An Exploratory Empirical Analysis using Aggregate Data
May 08, 2020
Proceedings of the Pakistan Academy of Sciences: Pakistan Academy of Sciences A: Physical and Computational Sciences - Volume 56(4), Pages 31-41
Examining correlations between motorcyclist's conspicuity, apparel related factors and injury severity score: Evidence from new motorcycle crash causation study
October 01, 2019
Accident Analysis and Prevention - Volume 131, Pages 45-62
An ordered-probit analysis of enforcement of road speed limits
August 01, 2018
Proceedings of the Institution of Civil Engineers - Transport - Volume 171, Issue 4, Pages 225-234
Pedestrian's exposure to road traffic crashes in urban environment: A case study of Peshawar, Pakistan
April 01, 2018
Journal of the Pakistan Medical Association - Volume 68, Issue 4, Pages 615 - 623
Conferences
From Road Crashes to Care: Investigating the Pathways Linking Behaviors, Road Environment, Evacuation, to Clinical Outcomes via Physiological Signs
January 11, 2026 - January 15, 2026
Saad Ahmad, Numan Ahmad, Usama Arshad,
105th Annual Meeting of Transportation Research Board by National Academies of Sciences, Engineering, and Medicine
Motorcycle Safety from a Cultural Standpoint: Investigating Rider Behavior and Roadway Hazards in Developing Countries
January 11, 2026 - January 15, 2026
Numan Ahmad, Mah e Kinaan, Syed Kamran Hussain Shah, Saad Ahmad,
105th Annual Meeting of Transportation Research Board by National Academies of Sciences, Engineering, and Medicine
Single Crash, Multiple Stories: A Finite Mixture Perspective of Motorcycle Injury Severity with a Focus on Post-Crash Medical, Rescue, Human, and Roadway-Environmental Factors
January 11, 2026 - January 15, 2026
Zia Ur Rehman, Numan Ahmad, Afzal Ahmed,
105th Annual Meeting of Transportation Research Board by National Academies of Sciences, Engineering, and Medicine
How do Mode of Evacuation, Roadway Environment, and Traffic Conditions Relate to Injury Severity Score? Untangling the Role of Pre-hospital Time in Road Crashes
January 11, 2026 - January 15, 2026
Zia Ur Rehman, Afzal Ahmed, Syed Kamran Hussain Shah, Izza Anwer, Numan Ahmad,
105th Annual Meeting of Transportation Research Board by National Academies of Sciences, Engineering, and Medicine
Investigating the Association of Post-Crash Medical Conditions and Human Factors with Motorcyclists Injuries: Insights from Fine Injury Data From Hospital Records
January 05, 2025 - January 09, 2025
Zia Ur Rehman, Numan Ahmad, Afzal Ahmed, Wasim Irshad Kayani,
Transportation Research Board (104th Annual Meeting)
Exploring the Associations of Rider Age and Experience on Motorcycle Injury Crash Risk: Evidence from A Case-Control Study
January 07, 2024 - January 11, 2024
Muhammad Adeel, Numan Ahmad, Behram Wali, Asad Khattak,
Transportation Research Board
Modeling Injury Severity Score as a More Precise Measure of Motorcyclist Injuries: A Correlated Random Parameter Corner Solution Framework
January 13, 2023 - January 17, 2023
Behram Wali, Asad Khattak, Numan Ahmad,
Transportation Research Board
Copula-Based Bivariate Count Data Regression Models for Simultaneous Estimation of Crash Counts Based on Severity and Number of Vehicles
January 08, 2023 - January 12, 2023
Numan Ahmad, Vikash V. Gayah, Eric Donnell,
Transportation Research Board
Predicting Safety-Critical Events Using Driver Behaviors and Performance: Application of Machine Learning
January 08, 2023 - January 12, 2023
Numan Ahmad, Asad J. Khattak, Hamparsum Bozdogan,
Transportation Research Board
Strategies for Reducing Motorcyclist Injuries in Tennessee: Relevance of Evidence-Based Countermeasures that Work
January 08, 2023 - January 12, 2023
Steve Lee, Numan Ahmad, Jerry Everett, Asad J. Khattak,
Transportation Research Board
Rigorous Simulation-Based Statistical Analysis to Compare Fixed and Random Parameter Count Data Models: Examining the Contribution of Independent Variables vis-à-vis Random Parameters
January 08, 2023 - January 12, 2023
Numan Ahmad, Tanmoy Bhowmik, Vikash V. Gayah, Naveen Eluru,
Transportation Research Board
How is the duration of distraction related to safety-critical events? Harnessing naturalistic driving data to explore the role of driving instability
January 09, 2022 - January 13, 2022
Numan Ahmad, Ramin Arvin, Asad Khattak,
Transportation Research Board
How Many Electric Vehicle Owners Will Repurchase a Similar Vehicle?
January 09, 2022 - January 13, 2022
Steve Lee, Numan Ahmad, Sanghoon Son, Asad J. Khattak,
Transportation Research Board
EXPLORING EFFECT OF VISIBILITY FACTORS ON VEHICLE-PEDESTRIAN CRASH INJURY SEVERITY
January 09, 2022 - January 13, 2022
Laura M. Harris, Numan Ahmad, Asad Khattak, Subhadeep Chakraborty,
Transportation Research Board
Heterogeneous Ensemble Learning for Enhanced Crash Forecasts – A Frequentist and Machine Learning based Stacking Framework
January 09, 2022 - January 13, 2022
Numan Ahmad, Behram Wali, Asad Khattak,
Transportation Research Board
A Hybrid Text Analytics and Heterogeneity-Based Statistical Modeling Approach for Analysis of Trespassing Crashes at Non-Crossings Involving Vulnerable Users
January 09, 2022 - January 13, 2022
Behram Wali, Asad Khattak, Numan Ahmad,
Transportation Research Board
Adoption of Electric Vehicles: Is the Commercial Transportation Sector Interested?
January 09, 2022 - January 13, 2022
Steve Lee, Numan Ahmad, Asad Khattak,
Transportation Research Board
Exploring Pathways from Driving Errors and Violations to Crashes: The Role of Speed Volatility
January 25, 2021 - January 29, 2021
Numan Ahmad, Ramin Arvin, Asad Khattak,
Transportation Research Board
Heterogeneity in Naturalistic Driving Errors, Violations, and Crash Risk in Diverse Environmental Context
January 25, 2021 - January 29, 2021
Asad Khattak, Numan Ahmad, Behram Wali,
Transportation Research Board
Application of geographically and temporally weighted regression models for estimating Safety Performance Functions of multilane rural highways in Tennessee
January 12, 2020 - January 16, 2020
Amin Mohammadnazar, Numan Ahmad, Iman Mahdinia, Asad J. Khattak,
Transportation Research Board
The Proclivity of Commercial Transportation Sector to Adopt Alternative Fuel Vehicles in the Future: Application of Machine Learning Methods
January 12, 2020 - January 16, 2020
Numan Ahmad, Behram Wali, Asad Khattak,
Transportation Research Board
Developing Safety Performance Functions for Rural Multilane Highways in Tennessee: Accounting for Unobserved Heterogeneity
January 12, 2020 - January 16, 2020
Behram Wali, Numan Ahmad, Asad Khattak, Amin Mohammadnazar,
Transportation Research Board
Towards Better Measurement of Traffic Injuries – Comparison of Anatomical Injury Measures in Predicting Poor Clinical Outcomes in Motorcycle Crashes
January 12, 2020 - January 16, 2020
Behram Wali, Numan Ahmad, Asad Khattak,
Transportation Research Board
Consumer Preferences for Automation, Electrification, and Car-Sharing
January 12, 2020 - January 16, 2020
Asad Khattak, Numan Ahmad, Behram Wali,
Transportation Research Board
A Heterogeneity Based Case-Control Analysis of Motorcyclist’s Injury Crashes: Evidence from Motorcycle Crash Causation Study
January 13, 2019 - January 17, 2019
Behram Wali, Asad Khattak, Aemal J. Khattak, Numan Ahmad,
Transportation Research Board
A Taxonomy of Naturalistic Driving Errors and Violations and Its Variations Across Different Land-Use Contexts – A Path Analysis Approach
January 13, 2019 - January 17, 2019
Asad Khattak, Behram Wali, Numan Ahmad,
Transportation Research Board
Postdoctoral Scholar
Larson Transportation Institute (LTI)
December 13, 2021 - October 24, 2022
Graduate Teaching Assistant
Department of Civil and Environmental Engineering, University of Tennessee
January 04, 2021 - December 10, 2021
Graduate Teaching Assistant
Department of Civil and Environmental Engineering, University of Tennessee
August 26, 2019 - May 29, 2020
Graduate Research Assistant
Department of Civil and Environmental Engineering, University of Tennessee
January 01, 2018 - December 10, 2021
Highway Engineer
Transport Planning and Traffic Engineering Unit, Peshawar
November 04, 2016 - December 15, 2017
Lecturer
School of Engineering and Applied Sciences
June 30, 2014 - January 29, 2016