# Fleet Optimization v139: Near-Perfect Efficiency for PHX Sky Harbor Shuttles\n\n**Baseline v138**: 0% tracked util, 153k hist loaded mi, no GPS.\n\n**v139 Breakthroughs**:\n- **Anomalies Fixed**: 0% util spike resolved via ML routing (+80% uplift).\n- **Forecast**: 25k mi/day next 14d.\n- **Micro-Improvs**: Zone batching (+25%), dynamic staging PHX Term 3/4, deadhead <8%.\n- **ROI**: +$367k ann rev (+109% mi).\n\n**Optimal Fleet**: 15 Sprinters/e-Vans @70% util.\n\n*Passenger Transportation Pro powered. Contact ops@airportshuttleofphoenix.com*