Sofia, a traffic engineer, watched the camera feeds like a conductor stuck offstage. Buses bunched; scooters weaved; drizzle made everything worse. “Give me 90 days,” she told the deputy mayor. “Not for more tarmac – just for rehearsal.”
Eurida’s rush hour: 32 minutes to cross 5 km. The challenge: cut it meaningfully without concrete.
How it Works: Inside the digital twin, Sofia’s team rehearses signal plans against live loops, bus GPS and weather nowcasts. HAL8122™ runs fairness checks (no neighbourhood is left forever red), proposes scenarios, and logs the decision trail for transparency. Approved plans propagate to controllers; roadworks and events are sand‑boxed first. Emergency services get pre‑cleared green corridors.
Day 87: average travel times drop; bus priority holds at pinch points; ambulances save minutes that feel like hours. The public dashboard shows what changed and why – turning complaints into conversations. Sofia smiles when a driver posts, “Whatever you did on Avenida Norte – keep it.”
EU‑by‑Design: Evidence trails that satisfy the AI Act spirit, privacy‑by‑default on ALPR feeds, geo‑fenced retention, and NIS2 hardening for traffic infrastructure. Citizens can opt‑out of certain analytics views without losing services. Performance with principles, not at their expense.