On the need to address fixed-parameter issues before applying random parameters: A simulation-based study
March 01, 2024
Numan Ahmad, Tanmoy Bhowmik, Vikash V. Gayah, Naveen Eluru,
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
Laura Harris, Numan Ahmad, Asad Khattak, Subhadeep Chakraborty,
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
Numan Ahmad, Ramin Arvin, Asad J. Khattak,
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
Afzal Ahmed, Farah Khan, Muhammad Ahmed, Muhammad Ali Ismail, Numan Ahmad,
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
Numan Ahmad, Vikash V. Gayah, Eric T. Donnell,
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
Numan Ahmad, Behram Wali, Asad Khattak,
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
Numan Ahmad, Ramin Arvin, Asad Khattak,
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
Behram Wali, Numan Ahmad, Asad Khattak,
Journal of Safety Research - Volume 80, Pages 175-189
Built environment, driving errors and violations, and crashes in naturalistic driving environment
July 01, 2021
Numan Ahmad, Behram Wali, Asad Khattak, Eric Dumbaugh,
Accident Analysis and Prevention - Volume 157, Article Number 106158
Understanding how relationships between crash frequency and correlates vary for multilane rural highways: Estimating geographically and temporally weighted regression models
July 01, 2021
Amin Mohammadnazar, Iman Mahdinia, Numan Ahmad, Asad J Khattak, Jun Liu,
Accident Analysis and Prevention - Volume 157, Article Number 106146
A taxonomy of driving errors and violations: Evidence from the naturalistic driving study
March 01, 2021
Asad Khattak, Numan Ahmad, Behram Wali, Eric Dumbaugh,
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
Behram Wali, Asad Khattak, Numan Ahmad,
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
Numan Ahmad, Anwaar Ahmed, Akhtar Ali Shah,
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
Behram Wali, Asad Khattak, Numan Ahmad,
Accident Analysis and Prevention - Volume 131, Pages 45-62
An ordered-probit analysis of enforcement of road speed limits
August 01, 2018
Behram Wali, Anwar Ahmad, Numan Ahmad,
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
Akhtar Ali Shah, Numan Ahmad, Ahn Byung Ha,
Journal of the Pakistan Medical Association - Volume 68, Issue 4, Pages 615 - 623