Nairobi's record divides cleanly in two, and the line runs between what the city measures and what the city builds. Four of its five entries are attempts to put numbers on the informal city — the minibus network mapped into a transit standard, an informal settlement surveyed by its own residents, prepaid dispensers metering water in Mathare, and a decree ordering the minibuses to take a contactless card. The fifth is an elevated toll road built over the top of all of it by a national agency and a Chinese state contractor. The pattern the four share is that measuring turned out to be the easy part. The matatu mandate specified one technology, met organised resistance and never took; the water dispensers charge what they promise and stand empty because cartels cut the pipes that feed them; the maps are open to anyone, which is also why nobody can say who uses them.
The atlas documents 5 projects in Nairobi, the earliest dating to 2009: 1 with a documented success, 1 documented failure, 1 scaled back, 2 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 Nairobi is actually doing.
Computed from the 5 entries below — a profile, not a score.
It began with a settlement putting itself on the map. In November 2009 thirteen young residents of Kibera were trained on GPS handsets and surveyed their own neighbourhood in about three weeks; the result went into OpenStreetMap that January — water points, latrines, clinics, informal schools, refuse sites. Map Kibera later repeated the method in Mathare and Mukuru. Two of its founding claims deserve care rather than repetition: that Kibera was simply blank before, which is the project's own framing and which no source found here tests against Kenyan survey records, and its population, counted at 170,070 in the 2009 census against estimates that still circulate at half a million and above.
Then the network. Digital Matatus mapped roughly 130 minibus routes by GPS phone from 2012 and put an informal transport system into Google Maps for the first time anywhere. What followed was an attempt to change the same system rather than describe it, and it failed. A ministerial legal notice inserted regulation 7(f) in June 2014, requiring every operator to run a cash light fare system using an ISO/IEC 14443 contactless card from 1 July. Four rival cards launched and competed instead of interoperating; the Central Bank had approved no provider by the deadline; the date slipped to December; Google withdrew BebaPay in March 2015. The rule was never repealed and still sits in the consolidated regulations.
In 2015 the same logic reached water. Nairobi City Water and Sewerage Company put prepaid dispensers into informal settlements, starting with four in Mathare Mashimoni with the Danish manufacturer Grundfos: load a card, tap, and draw metered water from the utility network at about half a shilling per twenty litres, against vendors charging anything from two shillings to fifty. The machines are run under contract by community youth and women's groups. Peer-reviewed fieldwork found the mechanism sound and the supply absent — the dispensers clustered along the main road while homes sat in the valleys, and their tanks frequently empty because the cartels they were built to displace cut the feeder pipes and siphoned the tanks.
What finally displaced cash was not decreed at all. From April 2020, under pandemic conditions, minibus operators began taking fares to M-Pesa phone, till and paybill numbers, and by 2025 a payment number chalked on the dashboard was ordinary. In the same period the city acquired the thing none of the mapping produced: a 27-kilometre elevated toll road, opened on 14 May 2022, owned by the national highways authority and financed and operated for 27 years by a subsidiary of China Road and Bridge Corporation. The tolling is electronic but not free-flow — barriers, an RFID unit, a prepaid card, mobile money, and cash lanes.
On a time axis, by the year each one started — 2009 to 2022. Pick a dot to read what it was.
✔ Every published entry is checked against the public sources it cites before publication.
Editorial links between Nairobi's own entries — the city as a system, not a list.
Plans and announced trajectories — not yet documented results.
The toll road is the clearest thing to watch, because its numbers behave in a way this atlas has not seen. Traffic did not disappoint: use more than doubled from the opening trial to 67,298 vehicles a day in the second half of 2024. The concession lost money anyway — 7.16 billion shillings of tolls against 9 billion of costs — because the repayment side is dollar-linked while the tolls are collected in a weakening shilling. Kenya's highways authority recommended cutting the toll and the Roads principal secretary refused; the Treasury has disclosed a 103.76 billion shilling termination sum payable if the state ends the deal early; and about 24.8 billion shillings of public money went into land, utility relocation and repairs to the road the expressway was built above. No auditor-general report on the concession was found, and no published traffic forecast exists to compare any of it against. Elsewhere the open questions are older. Regulation 7(f) is still law and still unenforced. The water dispensers will not work better until someone controls the pipes rather than the tap. And nothing here publishes an open data feed: the one genuinely reusable dataset in Nairobi's record is the OpenStreetMap layer residents built themselves, under a licence that outranks every African government catalogue in this atlas — and which, precisely because anyone may copy it, tells nobody who acted on it.
Where Nairobi appears in the atlas's own analysis.
Three cities the atlas reads next to Nairobi — the reason first, then the entries it rests on. Chosen by hand from the Nairobi threads below, not counted out of them.
Two answers to the same gap in transit data: Nairobi mapped the flexible service it already had and bent an open standard around it, Los Angeles wrote the standard and then paid heavily per boarding to create the service.
The same technique with opposite afterlives: both mapped an informal minibus network into an open standard, Nairobi's feed is still maintained and Accra's stopped — and neither touched how the drivers actually get paid.
Working hardware in cities where the surrounding system is not: a prepaid meter that counts its tokens perfectly and a water dispenser that runs fine, while the network behind each of them is the actual constraint.
Every editorial link from Nairobi'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 Nairobi, Kenya.” The Smart City Atlas. https://1001smartcities.org/cities/nairobi/ (last verified 2026-08-26). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.