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Full Reopening of Suyeonggang Riverside Underpass and Complete Restoration of Naeseong Underpass Before Morning Rush Hour; Mayor Park Heong-joon Urges Stronger Continuous Monitoring to Prevent Recurrence of Accidents

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Busan Metropolitan City (Mayor Park Heong-joon) announced that, following the occurrence of road subsidence at the entrance and exit roads of Suyeonggang Riverside Underpass and Naeseong Underpass, it promptly issued disaster alert messages more than six times and devoted full efforts to overnight emergency restoration, completing full reopening at 6:30 a.m. on April 6.

The city convened a situation assessment meeting and immediately activated a control tower in cooperation with relevant departments and related agencies. In collaboration with the police, traffic control measures were implemented, and intensive overnight emergency excavation and restoration work was carried out, led by the Construction Headquarters.

At Suyeonggang Riverside Underpass, traffic was controlled at 5:00 p.m. on April 5, and after conducting ground exploration (GPR) at 8:00 p.m., restoration work, including asphalt paving, was completed. A preliminary analysis of the ground survey found no additional risk factors such as cavities, allowing normal reopening at 10:50 p.m. the same day.

At Naeseong Underpass, full traffic control was implemented at 5:00 p.m. on April 5. Excavation was carried out at 7:00 p.m. to inspect the area around the subsidence, confirming that the cause was ground weakening due to residual settlement after soil backfilling. Through overnight work, partial reopening was achieved at 6:00 a.m. on April 6, followed by full reopening at 6:30 a.m., completing all measures.

Mayor Park Heong-joon stated that the city plans to repave the road after two weeks of ground exploration (GPR) monitoring and will make every effort to prevent similar incidents by strengthening monitoring of subsidence construction sections in the future.