Fuel changes were measured in five transportation categories: employee-owned rural delivery vehicles, postal-owned delivery vehicles, postal-owned mail transport vehicles, highway contract delivery vehicles, and air transportation.
Fuel use and emissions from ship and rail will remain virtually unchanged, since these modes represent less than 0.1 percent of total fuel use and emissions (from calendar year 2007). Vehicles not used to deliver, collect or transport mail were excluded because their Saturday use will not change significantly.
