Tri-County Regional Planning Commission

Travel Demand Model
Background  * Meetings * Maps * Definitions * Links
Background

What is Travel Demand Modeling?
  • Method to project future traffic volumes and evaluate various future roadway and land use strategies
  • Based on 4-Step modeling process originally developed for interstate planning in the 1950s
    • Trip Generation
    • Trip Distribution
    • Mode Split
    • Trip Assignment
  • Looks at the total system and related effects
  • Used by all major metropolitan areas and also as a state-wide model in many states (no current IL statewide model).
Why build a Travel Demand Modeling?
  • Evaluate effectiveness of Future Projects
  • Run "What if Scenarios"
  • Improve Traffic Planning and Forecasting
Model Development
  • Collected Land Use Information
    • Housing (single family/multi-family)
    • Retail, Office, Industrial
    • Schools
  • Collected Street Network Information
    • Counts
    • Lane Configurations
    • Traffic Control (Signals, stops, roundabouts)
  • Developed Trip Generation/Distribution Rates
    • Developed traffic analysis zones (TAZ)
    • Business Survey
    • Census info including household median income
    • NCHRP 187 rates, ITE trip generation rates
  • Collected future roadway projects
    • Current Region TIP and Long Range Plan
    • Current IDOT Plan
    • Cities Plans and future land use
  • Collected future land use information
    • City interviews, known developments
      Regional and County Planning
    • Illinois State-wide population projections
  • Developed future networks and future projections
Meetings
    Schedule for TDM Committee and Activities
    February 20
       Agenda
       Minutes
    April 16
       Agenda
       Minutes
       Handouts

Maps
    1990 Travel Area Zones - Tri-County Area
    1990 Travel Area Zones - Downtown Peoria
    2008 Travel Area Zones - Tri-County Area
    Existing Street Network
    Existing Land Use

Definitions
    TAZ - Travel Area Zone


Useful Links
Cube Software