• The Seoul Metropolitan Government issued a traffic advisory ahead of the 2025 Seoul Marathon, set to take place in Seoul on March 16.
• The event is scheduled to commence at Gwanghwamun Square in Sejong-daero and conclude at Jamsil Sports Complex in Songpa-gu, Seoul from 5:30 -13:30 (local time) on March 16.  
• The event will feature 40,000 participants from 66 countries.  
• A large deployment of safety personnel is slated to be positioned at starting points and throughout the course on the day. 
• As per the advisory, vehicular traffic will be diverted in phases through key locations, including Namdaemun Gate, Euljiro, Jongno, Sinseol-dong, Gunja Station, Children’s Grand Park, Seoul Forest, Jamsil Bridge, Jamsil Station and Seoul Sports Complex on the day. 
• Similar restrictions will be enforced for a 10-km race from Seoul Sports Complex to Garak Market Station in Seoul on March 16. 
• Traffic diversions will be in place across major roads along the marathon route, with some roads expected to remain closed until the event concludes.  
• Motorists are advised to use alternate routes and expect significant delays. 
• The official announcement can be found here. 

Those operating or residing in Seoul on March 16 are advised to allot for disruptions in the vicinity of the aforementioned areas due to the slated marathon event and associated traffic diversions.