The City of Boston integrated Google's Project Green Light, an AI system that analyzes traffic patterns and produces recommendations for adjusting traffic signal timing to reduce congestion. Boston's transportation engineers review each recommendation before implementing it.

The partnership with Google's Project Green Light began in February 2024. The system uses AI and Google Maps driving trend data to model traffic patterns at signalized intersections and recommend timing adjustments. Boston Transportation Department engineers assessed each recommendation for safety, feasibility, and effectiveness before implementation. At two intersections — Huntington Ave. & Opera Place and Amory Street & Green Street — stop-and-go traffic was reduced by over 50% after recommendations were applied.