Transport Analysis

This guide describes the Transport Analysis methodology within the LEAP software, detailing how energy consumption and environmental loadings are calculated based on vehicle stocks, mileage, and fuel economy.

• The Transport Analysis methodology calculates energy consumption as the product of the vehicle stock, the annual average distance traveled (mileage), and the fuel economy (such as liters per km or 1/MPG).
• Base year vehicle stocks are determined either through direct entry or by calculating historical sales data against a lifecycle profile of survival rates. For future scenarios, users can project vehicle sales, fuel economy, mileage, and environmental loadings for new vehicles, while lifecycle profiles track how these variables change as vehicles age.
• Unlike other demand analysis methods that only allow emission factors per unit of energy consumed (e.g., kg/TJ), the Transport Analysis method permits the specification of emission factors per unit of distance traveled (e.g., grammes/veh-mile), which is noted as more appropriate for regulated transport sector pollutant emissions.

APA

Stockholm Environment Institute (n.d.). Transport Analysis. https://leap.sei.org/help24/Demand/Transport_Analysis.htm

Chicago

Stockholm Environment Institute. Transport Analysis. n.d. https://leap.sei.org/help24/Demand/Transport_Analysis.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Transport Analysis |url=https://leap.sei.org/help24/Demand/Transport_Analysis.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendtransport, author = {{Stockholm Environment Institute}}, title = {{Transport Analysis}}, institution = {Stockholm Environment Institute}, url = {https://leap.sei.org/help24/Demand/Transport_Analysis.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }