Seoul faced challenges with its public transportation system, including decreased ridership and increased traffic congestion and travel times. To address these issues, Seoul implemented a smart transportation reform in 2004 that integrated the public transportation network through a unified fare system, trunk-feeder system, and free transfers between modes. The reform also included technological innovations like a new smart card system, as well as infrastructure and management improvements. The reform was unique in that it was successfully implemented in a large, existing city through information technology and new management, without major infrastructure additions. Collaboration between various groups including citizens, experts, and IT initiatives was also key to the reform's success.