Unitrans collects real-time data on the speed of every bus in the field. For ADVISOR, data from Unitrans “Column 50” bus route was used. Buses assigned to this route run 23 laps over the course of one day, which results in a total of 140 miles travelled. Column 50 was chosen because it represents the average distance travelled per day for all the Unitrans routes (140 miles). In ADVISOR, the XE40 was simulated on Unitrans Column 50 to determine if the bus could complete the day’s route without stopping to recharge. The fuel economy is a required input for both the economic and GHG models. The fuel economy results from ADVISOR are compared to that of the manufacturer specifications for the XE40 to ensure that the published numbers correspond to the actual route used in this study. A simulated drive cycle was created in ADVISOR (Figure 2). As shown, the bus’s speed never exceeds 16 mph with 9 stops along the route. The break in the bus’s motion halfway through the route represents the mandatory wait time at the bus depot before being deployed on the second half of the route. ADVISOR predicts that the XE40 uses 1.75 kWh per mile, while the ALTOONA test rating for the XE40 is 1.84 kWh per mile [12]. ADVISOR results are in close agreement with the ALTOONA rating, which manufacturers use for their published figures. The slight difference in energy use could be attributed to the difference in the ALTOONA drive cycle and the Davis Column 50 route. Given the closeness in the ADVISOR and ALTOONA results, the manufacturer’s efficiency ratings are used for the present study. Thus, the fuel economy input value for the GHG analysis is the average fuel economy of the four electric buses: 1.8 kWh per mile. Along with energy efficiency, ADVISOR predicts the total energy use over column 50 to be 247 kWh, or 146 miles, corresponding to 80% of the total battery capacity