Tarigan, R.N., Anas, M.R., Mulia, A.P., Hasibuan, G.C.R. and Tarigan, J. 2025. Impact Analysis of Infrastructure Changes from Signalized Intersection to Underpass on Vehicle Exhaust Emissions. Journal La Lifesci. 6, 6 (Dec. 2025), 528-539. DOI:https://doi.org/10.37899/journallalifesci.v6i6.2829.