Smart cycling infrastructure is the data layer a city wraps around the bicycle: counting riders, timing signals for them, registering bikes against theft and regulating shared fleets by data feed rather than by ban. The bicycle itself needs none of it — which is why this record is unusually honest about what the technology adds and what only asphalt can do.
This guide connects the plain-language green wave definition with 39 verified projects in 30 cities. Who pays for and owns bike-share is covered in the shared mobility guide and our ownership essay; this page stays on the infrastructure side — the counters, signals, registers and fences.
What counts as smart cycling infrastructure?
Four mechanisms recur across the verified record:
- Measuring. Paris publishes hourly counts from permanent Eco-Compteur sensors as open data — anyone can check whether Plan Vélo is working. London counts cyclists with over 1,000 edge-AI cameras that classify road users on-device and discard the video within milliseconds; TfL independently verified accuracy at around 97%.
- Prioritising. Copenhagen retimes signals on key corridors to a steady 20 km/h for cyclists. Frankfurt inverts this: a free app reads live phase data from 441 signal systems and tells the rider what speed catches the wave. Seattle added bike detection to 40 modernised signals.
- Protecting. Bogotá runs Colombia's only municipal bicycle register — serial number, photographs, sworn ownership declaration — checked at roadside stops and in raids on resale shops.
- Governing fleets. After 15 companies put 2.35 million dockless bikes on its streets, Beijing froze deployments in 2017 and regulated by data instead of banning: operators must stream fleet and trip data to a municipal platform, and "electronic fences" stop a rental ending outside marked parking.
Five instruments worth comparing
| City | Instrument | What the record shows |
|---|
| Copenhagen | Green wave, since 2007 | Cyclist speed rose ~15→20 km/h, red-light stops fell from up to six to 0–1 — buses lost 27–50 seconds |
| Paris | Open counter network | Hourly counts published daily; the growth case for new lanes is publicly checkable |
| London | AI vision sensors | 1,000+ cameras, ~97% verified accuracy, no facial recognition; feeds signal control |
| Bogotá | Mandatory bike register | 552,920 bikes registered — but that is 41% coverage, and the sanction is a warning |
| Beijing | Data mandates + geofences | 1.144 billion shared-bike trips reported for 2024 — operator data, no independent audit |
Does the data layer actually change behaviour?
Sometimes — and the strongest evidence points away from the gadgets. The single peer-reviewed win in this corpus is Beijing's green-travel incentive scheme, where a 2024 quasi-experiment found participants' subway trips rose 33.5% and car trips fell 14.1% — but cycling rose just 4.2%, the smallest shift of any mode. Darmstadt's Lincoln-Siedlung has independent longitudinal surveys showing two-car households fell from about 25% to 17.5% — parking design and tram links did the work, shared bikes were one ingredient. Copenhagen's green-wave numbers come from the city's own evaluation, which published the bus cost alongside the cyclist gain. Vienna's Supergrätzl shows discipline before data exists: its evaluation runs to September 2026, and no outcome numbers are claimed yet.
The register tells the same story from the other side. Bogotá recovered about one in five reported-stolen bikes in early 2026 — but of the bicycles recovered between 2021 and early 2024, roughly three quarters had never been registered. A database closes the loop only for objects that are on it.
Where cycling technology failed or shrank
No entry in this record failed because the technology stopped working. Copenhagen's Bycyklen — GPS and a tablet on every handlebar — grew from 169,000 to 933,000 rides in one year, went bankrupt in 2022 when the subsidies were withdrawn, and was never replaced. Bike Santiago shrank from 14 comunas to 5; with no public subsidy, the operator left the city's densest district via an in-app message, with no public decision taken. São Paulo pays its operator in advertising space — the promised e-bikes never arrived. Cairo's scheme collapsed twice in its first year, while roughly two of fifteen planned kilometres of protected lane were built. In Bogotá, trips fell 23% year-on-year and 110 of about 300 stations were vandalised. The pattern across all five: funding, contracts and street space decide outcomes; sensors and apps only report them.
Questions to ask before procurement
- Are you counting before you build? A permanent counter network is the cheapest item here and underwrites every later decision — Paris made its case public with one.
- Who owns the trip data? New York, Chicago and Boston publish open trip datasets; Santiago and Bogotá get an unlicensed availability feed on the operator's platform. Write the dataset into the contract, not the press release.
- What does cyclist priority cost other modes? Copenhagen published the bus delay; if a vendor claims priority is free, ask for the corridor evaluation.
- What enforces the rule? Bogotá's compulsory registration carries only a warning and reached 41% coverage. Beijing's fences are self-enforcing — the rental cannot end outside the zone.
- Is the headline number independent? Beijing's incentive scheme has a peer-reviewed evaluation; Beijing's trip totals and Santiago's CO2 claims are operator figures with no audit.
- What happens when the operator leaves? Bycyklen was never replaced; Santiago's coverage lasts exactly as long as each comuna stays profitable.
The practical takeaway: instrument the street before you gadget the bike. The counter, the signal plan and the data clause outlast any app — every failure in this record was one of money or street space, faithfully recorded by technology that could not prevent it.
Frequently asked
What is a green wave for cyclists?
A run of traffic signals timed so cyclists riding at a steady speed hit consecutive green lights (full definition). Copenhagen has timed key corridors to 20 km/h since 2007: a city evaluation found average cyclist speed rose from about 15 to 20 km/h and red-light stops fell from as many as six to zero or one — at a cost of 27–50 seconds of added delay for buses on the same streets.
How do cities count cyclists?
Two instruments dominate the verified record: permanent counters and computer vision. Paris publishes hourly counts from a network of permanent Eco-Compteur sensors as open data, refreshed daily. London draws on over 1,000 edge-AI camera sensors that classify road users on-device and discard the video within milliseconds; Transport for London independently verified their accuracy at around 97%.
Do bicycle registers reduce theft?
Only for bikes that are on them. Bogotá runs Colombia's only municipal register — 552,920 bicycles by April 2026, which the city itself puts at 41% of its bikes. About one in five reported-stolen bikes was recovered in early 2026, but of the bicycles recovered between 2021 and early 2024, roughly three quarters had never been registered.
Who owns cycling data?
It varies more than cities expect. New York, Chicago and Boston publish open trip datasets from their bike-share systems. Santiago and Bogotá get only a real-time availability feed that sits on the operator's platform and declares no licence. Beijing inverts the relationship: dockless operators must stream fleet, parking and trip data to a municipal platform as a condition of deploying at all.
