🚲 Mobility

AI-Adaptive Traffic Signals

Belo Horizonte began testing camera-based traffic-signal automation in May 2026 with a nine-intersection pilot on two streets that gave buses priority by reading route identifiers through a virtual camera loop. The city then announced a much larger rollout in July 2026: R$10.25 million to fit 500 controllers — about 1,500 of the city's roughly 3,000 signals — with sensors, cameras and AI that adjust signal timing to real-time vehicle and pedestrian flow, installation starting in August 2026 and operation expected from around October 2026, monitored remotely through COP-BH. The city projects up to a 30-35% cut in peak-hour travel time and fewer pedestrian collisions, but these are the municipal government's own pre-deployment projections, not measured results — the system had not gone live as of this review.

In build 📅 since 2026

🤖 AI-generated summary of the sources below — how this works · 🔎 Last verified 2026-08-02

🚲 Mobility Traffic management Sensors & IoT Artificial intelligence

🎓 Lesson

A city's own pre-launch percentage projection is not a measured result, however specific it sounds — this entry should be revisited once the system has actually been running long enough to audit.

Scale🏙️ City-wide

Cost≈R$10.25 million (initial phase, 500 controllers)

FundingMunicipal budget

📖 Terms in this entry: Adaptive traffic signals · ANPR (automatic number-plate recognition) · Congestion pricing

Sources

↗ O Tempo — "IA passa a controlar semáforos de BH e prefeitura prevê queda de 30% no tempo gasto no trânsito" (2026)500 controllers / ~1,500 signals (about 50% of the city's electronic signals), R$10.25M initial investment, installation from August 2026 with operation expected by October 2026, COP-BH remote monitoring, explicit confirmation the May 2026 nine-signal pilot preceded this larger rollout, and that the 30% figure is a municipal projection.

↗ Prefeitura de Belo Horizonte — "BH inicia projeto piloto de semáforos inteligentes para ônibus" (2026)8 May 2026 pilot: nine intelligent signals on Rua Niquelina and Rua Domingos Vieira, camera-based virtual loop reading bus route IDs to extend/advance green lights for transit priority; vendor Digicon; planned integration with COP-BH.

↗ Correio Braziliense — "Fim do sinal vermelho? BH anuncia IA que 'lê' trânsito e semáforos" (2026)Independent press confirmation of the same July 2026 announcement and technology (sensors, cameras, AI-adjusted signal timing).

This overview was generated with AI from the public sources listed above and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

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Compare this project

🇧🇷 COP-BH: Belo Horizonte's Integrated Operations Center · Belo Horizonte The AI signal pilot is monitored through COP-BH, the same integrated operations centre that has run the city's MOVE BRT since 2014. 🇹🇭 BMA AI Adaptive Traffic Signals · Bangkok Same AI-camera adaptive-signal concept, but Bangkok's has been live and expanding since 2024 while Belo Horizonte's is still pre-launch. 🇷🇸 Belgrade Sitraffic Adaptive Traffic Control · Belgrade Both are city-scale adaptive-signal retrofits rolling out intersection by intersection rather than switching on all at once.

Explore the wider context

🚦 Asphalt or algorithms 🚦 Traffic management guide 🏙️ Belo Horizonte city profile 🚲 Mobility projects

📎 Cite this project

1001 Smart Cities (2026). “AI-Adaptive Traffic Signals” — Belo Horizonte, Brazil. The Smart City Atlas. https://1001smartcities.org/projects/belo-horizonte-ai-adaptive-signals/ (last verified 2026-08-02). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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