Google Maps Experiment Shows How Small Routing Changes Reduce City Traffic

The power of collaboration: How we can reduce traffic congestion

We conducted a large-scale experiment across ten major US cities to test if coordinating a tiny fraction of trips could ease congestion. By subtly guiding drivers away from bottlenecks using Google Maps, we achieved measurable speed increases and fuel savings city-wide. This study proves that even minor, system-wide routing adjustments can significantly improve traffic flow and reduce emissions for everyone, not just app users.

"By coordinating a small fraction of trips, we can achieve systemic gains that benefit all road users — not just those using a specific app."