Worcester Regional Transit Authority

Key Performance IndicatorsElectric Bus Deployment Project

December 18, 2013

Introduction

• Project Goals– Achieve performance levels that meet or exceed existing fleet– Reduce fuel costs– Reduce emissions– Enhance transit service Cleaner, Greener

• Purpose of KPI Reporting– Assess performance of electric buses as compared to existing

fleet– Assess impact on WRTA’s agency-wide fuel costs– Assess impact on WRTA’s agency wide GHG emissions

The Fleet

Bus Type Quantity % of Fleet

29 GILLIG 5 10%29 GILLIG HYB 2 4%35 GILLIG 9 17%35 GILLIG HYB 6 12%40 GILLIG 15 29%40 GILLIG HYB 9 17%35' Electric 6 12%

Total Fleet 52 100%

The Routes

• Route 4

• Route 18

• Downtown “Green” Circulator (Route 80)

• Alternate: Route 8

• Alternate: Route 25

KPI: Mileage

KPI: Diesel Gallon Equivalent

KPI: Average Fuel Efficiency

KPI: Average Fuel Efficiency

Blue months indicate electric bills with estimated reads; kWh consumption was adjusted retroactivelyRed months indicate months with variable supply costs inadvertently left off, making cost/mile less than expected

KPI: Fleet Average Fuel Cost per Mile

Contracted Diesel Fuel Cost: $3.14/galAverage Electricity Costs: $0.20/kWh

KPI: Fleet Average Fuel Cost Per Mile

Blue months indicate electric bills with estimated reads; kWh consumption was adjusted retroactivelyRed months indicate months with variable supply costs inadvertently left off, making cost/mile less than expected

Electricity Costs

Blue months indicate electric bills with estimated reads; kWh consumption was adjusted retroactivelyRed months indicate months with variable supply costs inadvertently left off, making cost/mile less than expectedOrange indicates month with lower than typical demand charges applied ($3.26536 vs. $2.92 per kW)Note: Previous May 14 data included an estimated supply cost charge but was later removed b/c never applied in bill

KPI: Average Fuel Cost per Mile by Type

Contracted Diesel Fuel Cost: $3.14/galAverage Electricity Costs: $0.20/kWh

KPI: Change in Fleet Average Cost/Mile

Note: Electric buses represent 12% of WRTA total fleet

KPI: Availability

KPI: Emission Reduction

Total CO2 Reduction to

Date:

305 Tons!

Total Diesel Reduction to Date:

27,000 gallons!

Electric Bus Deployments

Current Deployments

Planned Deployments

Comparison Metrics - Efficiency

Comparison Metrics - Availability

Conclusions

• Greater utilization and the G-3 utility rate switch has lowered the electric cost per mile to below all other buses in WRTA fleets for April – October

• Availability issues continue to limit the potential of the electric bus fleet

• Cost per mile is seasonal– Expect higher cost/mile in the winter months