Centrally Controlled Adaptive Traffic Signals

Manaus signed a R$25.5 million contract in July 2022 to convert its pre-timed traffic signals into a centrally supervised adaptive network, starting with the Adrianópolis district. Cameras at each junction count queues and retime the green phases through the Sistema Inteligente de Monitoramento (SIM), which also reads bus number plates and can hold a phase for a public-transport vehicle running behind schedule, or for an ambulance on a call. Municipal mobility institute IMMU operates the network from a control centre in the West zone; by August 2025 the system covered 47 per cent of the city's 278 signalised junctions, rising to roughly 48 per cent and more than 130 junctions by 2026. Because faults can be diagnosed and cleared remotely, technicians no longer drive out to every dark signal.