Commuters endure stress from unpredictable traffic patterns with no engaging way to reframe the experience.
An app processes live traffic data (speed, density) into algorithmically generated soundscapes—slow traffic as a calming drone, flowing lanes as rhythmic pulses.
Cities or transit agencies might sponsor it as a public art project, or users pay for premium sound packs.
Start with a single city's traffic API and basic synth engine.
Risk: Novelty wears off if the music isn't compelling enough to retain users.