Office of Planning, Environment, & Realty (HEP)
Planning • Environment • Real Estate
Regional Travel Demand Model flows into
Modeled VMT by Roadway Class which flows into
HPMS-to-Model VMT Adjustment which flows into
HMPS-Adjusted VMT by Roadway Class which flows into
Travel Computations which flows into
Regional Emissions
Regional Travel Demand Model (referenced above) also flows into
Congested Speeds by Roadway Class which flows into
MOBILE which flows into
Emissions Factors by Roadway Class which flows into
Travel Computations (referenced above)
Highway Performance Monitoring System (HPMS) flows into
HPMS VMT by Roadway Class which flows into
HPMS-to-Model VMT Adjustment (referenced above)
Base Year HPMS to Model Adjustment Factors by Roadway Class flows into
HPMS-to-Model VMT Adjustment (referenced above)
Note: Speeds are estimated in a separate off-model step after traffic assignment known as post-processing using refined speed-volume relationships and final assigned traffic volumes.
