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Buenos Aires is an autonomous city wedged between a province of the same name and a national government that runs much of what matters. That split decides most of its record. The city built bus lanes and can fine drivers who use them, but the buses themselves are nationally regulated and their positions are read by a national ministry from SUBE farecard validators. It bought its street lights and their control platform outright rather than granting a concession — and still needs a separate regulator with a 36-hour clock to make a detected fault get fixed. Where the city acted entirely alone, the courts stopped it: its facial-recognition system has not run since 2022.
The atlas documents 11 projects in Buenos Aires, the earliest dating to 2002: 1 with a documented success, 1 documented failure, 3 scaled back, 6 still running without a verdict. Every entry carries an evidence grade — the strongest here is peer-reviewed (2 entries) — and links its sources.
Three entries that show what Buenos Aires is actually doing.
Computed from the 11 entries below — a profile, not a score.
The instruments came out of a collapse. After the 2001 crisis thousands of people were living off Buenos Aires's kerbsides, and in December 2002 the city stopped policing them and started registering them instead: Ley 992 created a compulsory register of waste pickers and of their cooperatives, and ordered them into the city's own collection service with credentials and work clothing. Ley 1854 followed in 2005, promising to cut what the city buried by 30% by 2010 and 75% by 2017.
Then came a decade of building, and of discovering what the city did not control. Two relief tunnels under the culverted Arroyo Maldonado opened in 2012 on a World Bank loan; the Bank's own evaluators later rated the project Moderately Unsatisfactory, because the money ran out on the half that was supposed to measure things. The first Metrobus corridor opened in 2011 and the 9 de Julio corridor in 2013 — lanes laid over the existing operators rather than a network rebuilt around them, which the city's audit office found had turned the first corridor into a priority lane rather than the closed-station BRT specified. Ecobici started in 2010 with 72 bicycles, the open-data portal in 2012, and the LED conversion was tendered in 2013 with its telemanagement system bought in the same contract.
The late 2010s were the city's confident years, and two of them did not survive. BA Elige launched in 2017 on Consul, the platform Madrid had open-sourced, and ran for exactly three editions; participation fell from 6.4 million site visits to 1.59 million, and the city never published what share of the winning projects was built. In April 2019 the security ministry switched on a facial-recognition system matching about 300 camera feeds against the national fugitives list. In February 2019 Ecobici passed to a private operator on a ten-year concession — with the city paying the operator, not the other way round.
The courts and the treasury have set the terms since. A judge suspended the facial-recognition system in April 2022; a second declared its implementation unconstitutional that September, after the case file showed roughly 9.9 million biometric queries covering some 7.5 million people against a fugitives list of about 35,000; the appeals court confirmed it in April 2023 and it has not run since. From April 2024 a SUBE card had to be registered to a person to get the ordinary fare, let alone the means-tested one — and on 1 July 2026 the national government froze that discount to the fares in force on 30 June, leaving provinces to absorb later rises. In 2025 the city ended the funded transport that brought cartoneros in from the suburbs.
On a time axis, by the year each one started — 2002 to 2019. Pick a dot to read what it was.
✔ Every published entry is checked against the public sources it cites before publication.
Editorial links between Buenos Aires's own entries — the city as a system, not a list.
Plans and announced trajectories — not yet documented results.
Three things are worth watching. The first is whether the facial-recognition case ever ends: the system remains suspended and the parties are deadlocked over how to audit it, the city offering a black-box review while civil society demands source-code scrutiny — and separately, the city has said its camera network will gain facial recognition from 2026, which would restart the argument rather than settle it. The second is what happens to the data the city does publish. Buenos Aires is only the second catalogue in this atlas whose licence counts close exactly with nothing unlicensed — but its own publication guide says CC BY 4.0 is applied "always" and five datasets out of 451 comply, and as of 1 July 2026 the city's GTFS and real-time transport feeds are suspended pending "revisión y corrección". The third is subtraction. The transport subsidy for cartoneros is gone, the city's fixed recycling drop-off points fell from 80 in 2021 to 22 in 2025, and the national fare discount that runs through SUBE now sits on a frozen base — a pattern of programmes narrowed rather than cancelled, which is harder to see and harder to argue with. One thing this page does not cover, because it belongs to the trains rather than to any system here: the asbestos found in second-hand carriages bought from Madrid, over which the city sued Metro de Madrid in 2019 and which the Subte workers' union counts at six deaths and 125 pneumoconiosis diagnoses by December 2025.
Where Buenos Aires appears in the atlas's own analysis.
Three cities the atlas reads next to Buenos Aires — the reason first, then the entries it rests on. Chosen by hand from the Buenos Aires threads below, not counted out of them.
The most closely matched pair in South America: the same bike-share operator on opposite cash flows, the same face matching against a fugitives list, and rain sensors that feed a control desk rather than trigger anything.
Mirror rulings on the same technology: a Buenos Aires court declared face matching unconstitutional where Chile's Supreme Court let the surveillance stand — and the same bike-share operator is paid in one city and pays in the other.
The same three things put online, three different endings: a participatory budget whose turnout collapsed in both cities, street lighting one owns outright and the other granted away, and face matching that only one court stopped.
Every editorial link from Buenos Aires's entries into another city, strongest first. Each one is a statement about two projects, not about two cities — the three above are the ones the atlas is willing to make at city level.
1001 Smart Cities (2026). “Smart-city projects in Buenos Aires, Argentina.” The Smart City Atlas. https://1001smartcities.org/cities/buenos-aires/ (last verified 2026-08-27). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.