Transport Analysis Calculations

This technical guide from the Stockholm Environment Institute explains the mathematical equations used for transport analysis within a demand technology framework, specifically covering stock turnover, fuel economy, mileage, energy consumption, and pollutant emissions.

• The transport analysis calculates stock turnover based on the number of vehicle types, the vintage (model year), the calendar year, sales expressions, and a survival lifecycle profile. The maximum number of vintage years is automatically determined from the survival profile, capped at 30 years.
• Fuel economy and mileage calculations incorporate degradation factors that represent the decline in efficiency or change in distance traveled as a vehicle ages; these factors equal 1 when the calendar year matches the vintage year.
• The system calculates distance-based pollution emissions for criteria air pollutants using an emission factor for new vehicles of a specific vintage and an emission degradation factor that accounts for changes as the vehicle ages.

APA

Stockholm Environment Institute (n.d.). Transport Analysis Calculations. https://leap.sei.org/Help24/Demand/Vintaging_Calculations.htm

Chicago

Stockholm Environment Institute. Transport Analysis Calculations. n.d. https://leap.sei.org/Help24/Demand/Vintaging_Calculations.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Transport Analysis Calculations |url=https://leap.sei.org/Help24/Demand/Vintaging_Calculations.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendtransport, author = {{Stockholm Environment Institute}}, title = {{Transport Analysis Calculations}}, institution = {Stockholm Environment Institute}, url = {https://leap.sei.org/Help24/Demand/Vintaging_Calculations.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }