Various assumptions about program effectiveness are employed, based on either experience from other areas or judgment.
Additional assumptions account for other factors such as prior mode of travel and trip lengths.
Impacts are estimated separately for work and non-work trips. Level of Effort - The calculation steps are clearly documented. Some effort may be required to develop assumptions appropriate for local use, and to set up calculations either on paper or in a spreadsheet. Advantages - Potentially helpful examples of calculations and assumptions are included for a number of strategy types. The calculations account for prior mode of travel as well as both trip and VMT-based emissions.