1. Worcester Regional Transit Authority Key Performance Indicators Electric Bus Deployment Project December 17, 2015

2. As a reminder… Over the past year, the battery electric buses were sent back to Proterra for Quality Assurance Remediation and System Upgrades In addition, E333 was sent back to Proterra in September for additional maintenance As a result, some KPIs are impacted due to a reduction of total electric mileage –i.e., demand charges spread over fewer miles, increasing cost/mile WRTA BEBStart DateEnd Date E33301/09/1503/09/15 E33403/16/1504/27/15 E33503/09/1505/08/15 E33604/28/1507/17/15 E33705/08/1507/31/15 E33807/17/1508/04/15 Plant incident; Requires replacement

3. KPI: Mileage Of note, monthly utilization is impacted by total # of days in the month and # of weekend days

4. KPI: Monthly Mileage per Bus Adjusted average excludes data for buses going through Proterra service updates

5. KPI: Availability Adjustment removes buses undergoing remediation from calculation

6. KPI: Diesel Gallon Equivalent

7. KPI: Average Fuel Efficiency

8. KPI: Fleet Average Fuel Cost per Mile Contracted Diesel Fuel Cost: $3.14/gal through April 2015 Current Contracted Diesel Fuel Cost: $2.7783 Average Electricity Costs: $0.19/kWh

9. KPI: Emission Reduction Total CO 2 Reduction to Date: 362 Tons! Total Diesel Reduction to Date: 51,700 gallons!

10. Projected Lifetime Fuel Savings Projected costs based on fuel cost inflation estimates from U.S. Energy Information Office. Excludes benefit of maintenance savings, emissions reductions Fuel Savings to Date: ~$42k (~$7k/bus) Projected Lifetime Fuel Savings: ~$376k (~$63k/bus)

11. Projected Lifetime Maintenance Savings Projected costs based on Proterra recommended preventative maintenance; WRTA labor rates/estimates Includes mid-life battery replacement for electric buses and hybrids; includes transmission and engine rebuild on diesel buses Projected Lifetime Main. Savings: $1MM ($167k/bus) Projected Lifetime Main. Savings: $764k (~$127k/bus)

12. Conclusions Additional months of data required to assess impact of remediation and system upgrades and improvements to availability Reduction in diesel contract price will continue to cause a temporary dip in net benefits Cost per mile is seasonal –Expect higher cost/mile in the winter months Lifetime benefit depends on utilization of the BEB’s and contracted cost of diesel

13. Worcester Regional Transit Authority Questions?