On weekdays last year, an average of 9,835,000 vehicles traveled on roads across Seoul each day, the city said. That was down by 10,000 from a year earlier, marking a decline for the second straight year. The most congested section downtown was Ujeongguk-ro, and among urban expressways it was the Bukbu Urban Expressway.
The Seoul Metropolitan Government on the 12th released the "2025 report on vehicle travel speeds and traffic volumes in Seoul," which contains these findings.
The report analyzes traffic volumes at 134 locations in Seoul and travel speeds on 510 major roads. It found the overall average traffic volume was 9,439,000 vehicles. Weekdays saw 9,835,000 vehicles, and holidays 8,630,000.
Olympic-daero had the highest traffic among urban expressways with 239,000 vehicles a day. It was followed by Gangbyeonbuk-ro (220,000) and the Gyeongbu Expressway (190,000). Downtown, Namsan Tunnel No. 1 had the most traffic with a daily average of 71,000 vehicles, followed by Sajik-ro (68,000) and Sejong-daero (62,000).
Average travel speeds on Seoul roads were 21.7 kph on weekdays and 23.9 kph on holidays. That is similar to last year's weekday (22 kph) and holiday (24.1 kph) speeds.
The most congested urban expressway was the "Bukbu Urban Expressway." Following last year (39.6 kph), this year it posted 36.8 kph, the slowest speed. Downtown, Ujeongguk-ro, where intersections are close together and rallies are frequent, ranked No. 1 at 16.1 kph.
Yeo Jang-kwon, head of transportation at the Seoul Metropolitan Government, said, "Based on these analyzed results, we will push forward with a range of transportation policies to improve convenience for residents."