Abdul, R., Hakzah, H., Andriyani, A., Jasman, J., & Kasmaida, K. (2026). Impact of Road Gradient on Fuel Consumption, Fuel Rate and CO₂ Emissions of Freight Transport. ASTONJADRO, 15(1), 284–294. https://doi.org/10.32832/astonjadro.v15i1.21234