Abdulkarim, M., Abdulkarim, M., Yakubu, F. Z., & Yusuf, D. (2026). Smart Transportation System: Evaluating the Effectiveness of Smart Transportation Systems in Reducing Congestion and Emissions in Kaduna Metropolis, Nigeria. Kaduna Journal of Geography, 7(1), 273-282. https://doi.org/10.47514/kjg.2025.07.01.030