South Korean expressways experienced widespread traffic congestion on Friday as travelers headed out for the Constitution Day holiday [1].

This surge in vehicle volume highlights the significant impact of national holidays on the country's transport infrastructure, often leading to severe bottlenecks on primary arterial roads.

As of 15:30 KST, the Gyeongbu Expressway saw the most significant delays [1]. Congestion stretched 37 km in the direction of Busan and 18 km toward Seoul [1]. The bottlenecks were particularly acute near the Yangjae interchange [1].

Other major routes also faced heavy volumes. The Seohaean Expressway reported 15 km of congestion, specifically west of Pyeongtaek [1]. Additionally, the Yeongdong Expressway experienced delays near the Masung Tunnel in Yongin [1].

Reporter Lee Hyun-jung of YTN said vehicles were lined up in long rows and unable to gain speed [1]. The congestion is a direct result of increased travel demand associated with the first day of the Constitution Day holiday [1].

Despite the current delays, officials expect the traffic to ease. An unnamed YTN anchor said the congestion is expected to clear completely by the evening [1].

“Congestion stretched 37 km in the direction of Busan”

The recurring congestion during national holidays like Constitution Day underscores the persistent pressure on South Korea's expressway network during peak travel windows. While the Gyeongbu and Seohaean routes are critical for economic and social mobility, their vulnerability to holiday surges suggests a continued need for diversified transit options or improved traffic management systems to handle sudden spikes in volume.