|Surface Transportation Efficiency Analysis Model (STEAM)||User Manual|
The following is list of sources for the default parameter values used in STEAM 2.0:
Value of Time -
Cost Per Gallon of Fuel -
Fuel Consumption Rates -
HC - EPA's, Mobile 5a model results.
CO - EPA's, Mobile 5a model results.
NOx - EPA's, Mobile 5a model results.
PM10 - EPA's, PART5 model results.
Cost Per Ton of Emissions -
Emissions Per Cold Start - HC, CO, and NOx are from EPA's Mobile 5a model results.
Cold Starts Per Trip -
Greenhouse Gas Emissions - FTA, New Starts Criteria Report, 1997.
Cost Per Accident - The Urban Institute, The Cost of Highway Crashes, Final Report.
Fatality Rates - FHWA, Highway Safety Performance - 1992, January 1995.
Injury Rates - FHWA, Highway Safety Performance - 1992, January 1995.
PDO Crash Rates - NHTSA, Traffic Safety Facts, 1993.
Noise Costs - FHWA, Federal Highway Cost Allocation Study; Appendix E, 1997.
Discount Rate -
Risk Ranges - Research team judgement.
Federal and State Fuel Tax Rates - FHWA, Highway Statistics - 1995, Table MF-121T.