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Travel Model Improvement Program Iowa Peer Exchange Travel Demand Model Calibration/Validation

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Travel Model Improvement Program Iowa Peer Exchange Travel Demand Model Calibration/Validation. Presented by James B. Miller. Iowa Department of Transportation Ames, IA March 30 - April 1, 2004. Discussion Topics. Introduction Transportation planning projects

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Presentation Transcript
slide1

Travel Model Improvement Program

Iowa Peer Exchange

Travel Demand Model Calibration/Validation

Presented by

James B. Miller

Iowa Department of Transportation

Ames, IA

March 30 - April 1, 2004

discussion topics
Discussion Topics
  • Introduction
  • Transportation planning projects
    • Validation/Calibration steps
  • Remarks
simpco transportation system planning model
SIMPCO Transportation System Planning Model
  • Background
  • Results
  • Model Applications
simpco results
SIMPCO - Results
  • Steps
    • iterations
  • Key items
    • friction factors
    • time penalty - bridges
  • Screenline comparisons
simpco model applications
SIMPCO Model Applications
  • Forecasted traffic volumes for the downtown (Sioux City) segment along I-29
kane county il
Kane County, IL
  • Background
  • Results
  • Model Applications
kane county results
Kane County - Results
  • Steps
    • iterations
  • Key Items
    • friction factors
  • Mean travel time comparison
  • Screenline comparisons
    • within acceptable guidelines
kane county model applications
Kane County Model Applications
  • Sub-area planning studies
  • Impact fee program
  • 2030 Long Range Transportation Plan
  • Fox River bridge crossing
lctip results
LCTIP - Results
  • Steps
    • Iterations
  • Key items
    • Zone splitting - centroid connectors
    • Volume delay functions
  • Screenline comparisons
lctip applications
LCTIP - Applications
  • Traffic Model used in the alternative development phase
  • Formed the basis of the County’s Long Range Transportation Plan
remarks
Remarks
  • Use practical guidelines - references
  • Establish total travel demand, then adjust at the route/link level
  • Key items
    • “Good data” - traffic network and socioeconomic
    • Special Generators
    • Friction Factors
    • Volume Delay Functions
    • External trips
  • Model applications