TOPIS — Seoul Transport Operation & Information Service
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Seoul's citywide traffic control tower at City Hall fuses real-time bus and taxi GPS, transit-card swipes, CCTV, road-loop detectors and variable message signs into one operations room. It manages bus intervals, monitors congestion and coordinates incident response, and draws on years of accumulated traffic data to forecast demand before jams form.
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The strongest source is an independent non-academic evaluation: an audit office, a government or EU review, or an NGO. It grades who did the looking — not how well the project went. All four grades →Sources
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1001 Smart Cities (2026). “TOPIS — Seoul Transport Operation & Information Service” — Seoul, South Korea. The Smart City Atlas. https://1001smartcities.org/projects/seoul-topis-traffic-control/ (last verified 2026-07-21). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.