TransMiCable: the cable car that got a control group
A gondola of about 3.3 km has linked the hillside settlements of Ciudad Bolívar to the TransMilenio trunk network at Portal del Tunal since December 2018 — four stations, inside the same fare. What distinguishes it is that someone built a counterfactual: the TrUST natural experiment surveyed 2,052 adults here and in San Cristóbal, a comparable hillside district with no cable car, before and after opening. Travel time fell and women's quality of life rose against the control. Physical activity did not move at all, and an independent study of 662 million phone pings found residents travelling more but not into richer parts of the city.
Self-reported one-way travel time for mandatory trips fell from 110.0 to 90.2 minutes in the cable-car area. Against the San Cristóbal control district, quality of life rose 5.81 points for women (95% CI 2.47-9.14) but not significantly for men (0.96, 95% CI -3.65 to 5.57); moderate-to-vigorous physical activity did not change. 1,679 of 2,052 recruited adults completed follow-up. The city reports 44.7 million trips in the first six years, around 25,000 a day.
🎓 Lesson
Bogota is the rare urban cable car with a comparison neighbourhood, and the discipline shows in what the evaluation was willing to publish: no effect on physical activity, gains that reached women and not men, and more trips without more contact between income groups. Mexico City's Cablebus has a defensible cost-per-passenger figure but no counterfactual; this line has both a control district and its own null results.
Evidence🔬 Peer-reviewed
Scale🏘️ District
Cost≈COP 240,000M at opening
FundingCity of Bogotá (IDU), with credit from the national development bank Findeter
Sources
↗ Frontiers in Public Health — TrUST study protocol (2020)Establishes the design: 'a prospective, quasi-experimental study using a mixed-methods approach' comparing intervention (Ciudad Bolívar, within 800 m of stations) with control (San Cristóbal, selected for similar topography, comparable planned cable car, similar low socioeconomic status and high crime). Baseline Feb-Nov 2018, follow-up 2019. Funders include Wellcome Trust and NIH; institutions Universidad de Los Andes, UC Berkeley, Stanford, Drexel. This is the source for the control-group claim.
↗ The Lancet Global Health — physical activity outcomes of TrUST (2023)Source for the travel-time figure (mandatory-trip one-way time 110.0 → 90.2 minutes in the intervention area) and for the null result: transport walking meeting WHO guidelines rose 11.1 points in the intervention area against 8.0 in control, adjusted OR 1.1, p=0.38 — not significant; accelerometer-measured moderate-to-vigorous activity showed no change. 2,052 recruited, 1,679 followed up. Note the travel-time figure is a within-group before/after number, not a difference-in-differences estimate.
↗ The Lancet Regional Health – Americas — quality of life outcomes of TrUST (2025)Source for the quality-of-life effect sizes, which ARE time-by-group interactions against the control district: females +5.81 points overall (95% CI 2.47-9.14), general health +5.49, psychological domain +3.48; males not significant (0.96, -3.65 to 5.57). No significant effect for either sex on physical health, social relationships or environmental domains. Sample 1,679 (825 intervention, 854 control), 62.8% female, mean age 43.5.
↗ Lutz, Heroy, Kaufmann & O'Clery — causal evaluation using mobile phone data (2025)Independent difference-in-differences event study comparing residents within 500 m of opened stations against residents near FUTURE planned stations; 662 million GPS pings from 902,000 phones, July 2018-June 2019. Finds ≈6.5 additional trips per person per month (≈5%) and +3 points of interest visited, but limited evidence of socioeconomic mixing and no statistically significant increase in visits to high-income neighbourhoods. PREPRINT dated 11 June 2025 — publication status not confirmed; treated as supporting, not load-bearing.
↗ Alcaldía Mayor de Bogotá — six years of TransMiCable operation (29 December 2024)Authority-reported figures: 44.7 million trips over six years, around 25,000 people per day, ≈37,600 service hours, 163 cabins, 24 towers, four stations (Tunal, Juan Pablo II, Manitas, Mirador del Paraíso), ≈13 minutes end to end, capacity 3,600 passengers per hour per direction. The city gives the length as 3.25 km here; other accounts give 3.34 km, hence 'about 3.3 km' in the entry. The 3,600/hour figure is design capacity and is deliberately NOT used as a ridership number.
↗ Alcaldía Mayor de Bogotá — 2026 fare adjustment for TransMilenio, TransMiCable and TransMiZonalEstablishes the fare mechanism: a single unified fare of COP 3,550 effective 14 January 2026 (a 10.9% rise), with TransMiCable included. Transfers between trunk buses, zonal buses and the cable car are free within a 125-minute window — but only with a PERSONALISED TuLlave card; non-personalised cards pay the same base fare without the transfer benefit. The card itself is covered by a separate atlas entry.
↗ Infobae — TransMiCable service suspended more than 24 hours (4 July 2026)Counterweight on reliability: service failed to open at its usual 04:30 start on Friday 3 July 2026 and was still down after ≈28 hours on Saturday 4 July; specialists from the Austrian manufacturer were involved and no root cause was disclosed. TransMilenio reinforced zonal buses as a substitute. The article gives no availability history.
↗ El Espectador — cause of an earlier TransMiCable suspensionReports an earlier outage traced to an electronic card in the control and power system, a specialised part that had to be sourced from outside normal inventory, and cites the operator's claim of availability above 98% since taking over. The 98% figure is operator-reported and is not used in the entry.
↗ El Espectador — 'La Rolita' to operate the Ciudad Bolívar cable carSource for the operator field: TransMilenio S.A. ratified an inter-administrative agreement making La Rolita, the city-owned Operadora Distrital de Transporte, the operator from 29 December 2023, replacing the earlier Transdev/Fanalca arrangement. Verified through search results and headline; the full article was not fetched.
↗ La República — TransMiCable opens after COP 240,000M investment (2018)Source for the cost figure at opening. Other official figures differ: the IDU cited COP 236,000M including land acquisition, and an earlier design-and-construction figure of COP 164,300M circulates. The range is left visible rather than averaged.
↗ TransMilenio S.A. — official TransMiCable pageOperator's own page. FETCH FAILED: returned HTTP 403 to automated retrieval on 26 July 2026, as Colombian government sites frequently do. No claim in this entry rests on it; the city government's bogota.gov.co pages were used as the authority source instead.
📎 Cite this project
1001 Smart Cities (2026). “TransMiCable: the cable car that got a control group” — Bogotá, Colombia. The Smart City Atlas. https://1001smartcities.org/projects/bogota-transmicable/ (last verified 2026-07-26). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.
