YOU ARE HERE
For the purposes of portfolio planning, a Federal agency's first data analysis step is to determine which mobile emissions sources represent the largest contributors to the agency's overall greenhouse gas (GHG) emissions. Agencies can use agency-level data to determine which fleets/locations, which vehicle assets (e.g., fleet vehicles, non-fleet equipment, etc.), and which fuel types are producing the largest amounts of emissions.
Based on this analysis, the agency can better define which mitigation strategies will be most effective. For instance, if a single fleet comprises over half of the agency's vehicle and equipment emissions, the agency may choose to work with this particular site to optimize its size and vehicle inventory. However, if a single site or fleet does not emerge as an overwhelming contributor to emissions, agencies may choose to focus mitigation efforts on overarching strategies aimed at, for instance, reducing gasoline consumption or minimizing the number of heavy-duty vehicles operated by the agency.
|Figure 1. Distribution of Agency ABC emissions
according to mobile source
To illustrate, Agency ABC uses its annual GHG inventory report to determine at a very high level which vehicle assets and fuels warrant the greatest focus for mitigation efforts. Figure 1 shows that over half of the agency's mobile source emissions result from fleets, as compared to non-fleet vehicles and equipment.
Within each category, the agency can further examine which fuels are contributing to emissions. As Figure 2 illustrates, nearly 80% of Agency ABC's total mobile emissions result from three categories of fuel combustion: non-fleet diesel (31%), fleet gasoline (27%), and fleet diesel (20%). Thus, this analysis shows that the agency can potentially achieve the greatest emissions reductions by focusing mitigation strategies at reducing gasoline and diesel consumption across its portfolio of mobile sources, rather than focusing on mitigating emissions specifically in its fleet vehicles.
Figure 2. Fleet and non-fleet vehicle and equipment emissions
Did you find the information that you needed? Please let us know. The Federal Energy Management Program welcomes any feedback on its GHG mitigation content. To provide feedback, see Contacts.