1. 1CONFIDENTIAL | Measure of SuccessStatusNotes / Comments Fuel Economy (MPGe)Average MPGe = >16 Cost per MileAs mileage has increased in 2014, the cost per mile has been reduced ($0.36 / mile) Reduction of Greenhouse Gases2014 Diesel Fuel Saved = 3,107 gal Dispatch AvailabilityDespite Improvements in 2014, the last 4 weeks have been unacceptable The recent performance issues are unacceptable to Proterra and we are committed to ensuring the WRTA electric bus project is a success

2. 2CONFIDENTIAL | 5 th bus added Recent Issues Summer Route Reduction Fleet Update Charger Update Fleet Update Average Fuel Economy >16MPGe vs. 3.9MPG for Diesel Recent issues: wiring quality low-voltage systems wipers Upwards trend in weekly miles and dispatch availability accomplished through continuous improvement mindset at both Proterra and WRTA

3. 3CONFIDENTIAL | Propose to cycle buses back to Proterra to receive product updates Design improvements developed since WRTA buses delivered Thoroughly inspect all components and resolve any issues, focus on wiring and low voltage system. Chance to learn more from buses operated in winter climate 1 bus at a time for ~5wks each ~7 month long project timeframe, beginning Jan 2015 Updates complete Summer 2015