<![CDATA[Aim: This study focuses on the main urban corridors of Makassar City and the short-term exposure levels of CO, PM2.5, and TSP resulting from traffic congestion during peak hours. Methodology and Results: Field measurements were conducted along three major corridors: Sultan Alauddin, A.P. Pettarani, and Urip Sumoharjo. The measurements included pollutant concentrations, traffic counts, and weather conditions during both peak and non-peak periods. The study employed a time-series quantitative observational design. The statistical analyses used were Pearson’s correlation, multiple linear regression, and the independent-samples t-test. The results revealed correlations of 0.98–0.99 between traffic volume and CO concentrations, and 0.94 for TSP. During peak periods, a strong correlation was observed between vehicle volume and PM2.5 levels, which exceeded WHO limits. TSP concentrations were also noticeably above the acceptable exposure range. CO concentrations were influenced by traffic volume and remained low but significant. Conclusion, Significance, and Impact of the Study: During peak traffic congestion, substantial tailpipe and non-tailpipe emissions are released, leading to the accumulation of pollutants along urban corridors. The implementation of a fully functional multi-corridor and multi-pollutant traffic and air quality monitoring system demonstrates an assessment framework that can be applied in other locations. These findings provide evidence to support sustainable urban transport systems and air quality management strategies, with expected outcomes including time-targeted traffic control and reductions in non-tailpipe emissions. Ultimately, these efforts contribute to achieving the Sustainable Development Goals (SDG 11 and SDG 3) related to improved air quality.]]>
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