Run on Less will demonstrate how Class 8 trucks can use different technologies to achieve the best fuel economy possible. The three-week experience will kick off from multiple locations across the United States and culminate at the North American Commercial Vehicle (NACV) inaugural show in Atlanta. Seven fleets are participating in the Run: Albert Transport Inc., PepsiCo’s Frito-Lay division, Hirschbach, Mesilla Valley Transportation, Nussbaum Transportation, Ploger Transportation, and US Xpress.
The trucks are equipped with current, commercially available technologies, and drivers will demonstrate how to achieve the best fuel economy in today’s highway tractors, with a goal of achieving 9.0 mpg or more.
MEASURING FUEL ECONOMY
The mpg will be total mpg (i.e., includes idle fuel).
- Miles per gallon will be calculated by combining two methods:
- The first is by reading fuel-consumption data from the CAN bus using Geotab telematics devices installed on the trucks. CAN data via telematics is available in near-real time, which makes it useful for reporting over a specific period, such as for a day or a trip.
- The second method is by tracking fill-ups. This method can be more accurate than the first method over a longer period of time since it is tracking the actual fuel that went into the truck.
- The total truck average fuel consumption is calculated by summing total miles driven by all trucks above a minimum threshold of 50 miles divided by total fuel consumed by those same trucks.
- A day is defined as midnight to midnight Eastern Time.
- Results are updated approximately once per hour.
- Each truck will likely fill up at least 7–10 times during the Run.
- Miles per gallon based on fill-ups will be compared to what the CAN data shows and an adjusting factor may be used on the CAN data for day-to-day reporting.
In order to portray the conditions drivers and their equipment are facing, in addition to mpg, we will be showing some of the factors that are likely to affect fuel economy. These include the total gross weight of the truck, total elevation gain, average vehicle speed and average wind speed.
- Gross weight is estimated using two methods: Method one is by adding the weight from the bill of lading (reported by the driver) to an estimated curb weight of the truck and trailer. The second method is based on a calculation performed by Nevin Avenue LLC using telematics data.
- Elevation data is collected from Google Maps based on GPS points provided by Geotab.
- Average vehicle speed is calculated when the vehicle is traveling at speeds greater than 5 MPH.
- Average wind speed is based on wind data collected along the truck’s route from OpenWeatherMap and calculated by taking the component of wind in the direction of travel. A headwind is shown as a negative number and tail winds as positive values. As an example, wind at 5 MPH directly opposite the direction of travel (a headwind) is shown as - 5 MPH. If the vehicle were to turn by 20 degrees and the wind stayed the same, it would be shown as -4.7 MPH. While it is recognized that cross winds can also affect mpg, they are not considered in this calculation.
ON WHY TRUCKS AREN’T IDENTIFIED
Truck data is shown without identifying the specific vehicle in order to maintain anonymity. A goal of Run on Less is to highlight the effectiveness of the many different technologies, not to identify a specific ‘winning’ combination. Therefore, to minimize any competitive aspect and keep certain information proprietary, trucks on the map and in the Results section are not identified.
GALLONS, DOLLARS, & CO2 SAVED
Gallons saved is calculated by comparing the fuel consumption of the Run on Less trucks to the amount of fuel they would have consumed if they all had an mpg of 6.4, the U.S. national average. Various datasets were supplied to NACFE and used for this estimate for all of the 1.7 million over-the-road tractor trailers in use in the U.S.
Dollars saved is based on an average diesel price of $2.50 per gallon.
CO2 saved is based on the fuel savings and is presented in metric tons. Combustion of one hundred gallons of diesel fuel emits 1.01 tons of CO2 into the atmosphere.