<![CDATA[Abstract. Traffic congestion is a transportation problem that causes economic losses due to increased vehicle operating costs and travel time losses. This study aims to analyze traffic conditions and estimate congestion costs on the Tamansari Road Corridor between Siliwangi Intersection and Cikapayang Intersection in Bandung City. The study employed a descriptive quantitative approach using the Cost of Congestion (COC) method. Data were collected through field observations and secondary sources. The results indicate that traffic congestion increases vehicle operating costs and travel time, resulting in economic losses for road users. The findings are expected to support urban transportation planning and traffic management policies. Abstrak. Kemacetan lalu lintas merupakan permasalahan transportasi yang menimbulkan kerugian ekonomi akibat meningkatnya biaya operasional kendaraan dan hilangnya waktu perjalanan. Penelitian ini bertujuan menganalisis kondisi lalu lintas serta mengestimasi biaya kemacetan pada ruas Jalan Tamansari Koridor Simpang Jalan Siliwangi–Simpang Jalan Cikapayang Kota Bandung. Penelitian menggunakan metode Cost of Congestion (COC) dengan pendekatan kuantitatif deskriptif. Data diperoleh melalui survei lapangan dan data sekunder dari instansi terkait. Hasil penelitian menunjukkan bahwa kemacetan pada lokasi penelitian menyebabkan peningkatan biaya operasional kendaraan dan nilai waktu perjalanan sehingga menimbulkan kerugian ekonomi bagi pengguna jalan. Hasil penelitian diharapkan dapat menjadi bahan pertimbangan dalam perencanaan dan pengelolaan transportasi perkotaan.]]>
