1. Floating Car Data (FCD) Pings
Active smartphones running navigation software send encrypted GPS pings containing timestamp, coordinates, and instantaneous velocity vectors back to central navigation servers.
2. Historical Baseline Variance
The aggregation engine snaps pings to road graph edges and compares live average velocities against historical baselines for that exact day and hour (e.g. 45 mph normal vs 12 mph live).
3. Dynamic Graph Edge Weighting
Edge traversal weights ($W = \text{Distance} / \text{Speed}_{\text{live}}$) are dynamically recalculated across the road network graph as probe pings arrive.
4. Real-time A* Rerouting
When slowdowns occur on key bottlenecks like Main St Bridge, oncoming vehicles automatically evaluate surrounding edges to calculate optimal time-saving shortcuts before entering gridlock.