REGIONAL TRAVEL DEMAND MODEL IMPROVEMENT PROJECT by czl10931

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									REGIONAL TRAVEL DEMAND
  MODEL IMPROVEMENT
       PROJECT
           An Update to
The SCAG Regional Modeling Task Force
                By




            March 26, 2003
                 Presentation Overview
   Project Scope
   Activity Update
      • Common MPO Improvements
      • Future Needs
      • Short-Term Model Improvements
   Continuing & Future Activities



March 26, 2003                           2
                 Project Scope
   Purpose & Objectives
   Technical Approach
   Schedule




March 26, 2003                   3
                 Purpose & Objectives
   Region’s growth outstripping current tools
   Significant trade-offs must be considered
   Enhance the model’s responsiveness
   Improve the analysis of emerging issues
   Increase utility for regional consistency




March 26, 2003                              4
                 Technical Approach
   1.      Review the previous improvement program
   2.      Inventory other MPOs’ programs
   3.      Identify future modeling needs
   4.      Review SCAG’s current regional model
   5.      Develop a short-term improvement program
   6.      Develop a long-range strategy
   7.      Assemble a model review panel
   8.      Coordinate with the Modeling Task Force
   9.      Prepare final report

March 26, 2003                                   5
                         Original Schedule
                                                               MONTH
                                       Aug   Sep   Oct   Nov    Dec    Jan   Feb   Mar   Apr

Review Prior Model Improvement

Inventory Other MPO Improvements

Identify Future Modeling Needs

Review Current Regional Model

Short-Term Model Improvement Program

Develop Long-Range Modeling Strategy

Assemble Model Review Panel

Coordinate with Modeling Task Force

Prepare Final Report




 March 26, 2003                                                                           6
                 Activity Update
   Other MPO Improvement Programs
      • 12 large MPO model improvement programs
      • Candidate Peer Review Panel members
   Future Modeling Needs
      • Opportunities for improvement
      • Expanded modeling capability
   Short-Term Model Improvements
      • Retain structure - model recalibration
      • Incremental component enhancement


March 26, 2003                                    7
                 Recent Activities
                  MPOs Surveyed

   Baltimore (BMC)         New York (NYMTC)
   Boston (CTPS)           Portland (Metro)
   Denver (DRCOG)          Sacramento (SACOG)
   Detroit (SEMCOG)        San Francisco (MTC)
   Houston (HGAC)          Seattle (PSRC)
   Los Angeles             Washington
    (SCAG)                   (WashCOG)


March 26, 2003                                8
    Common MPO Improvements
   Transportation-Land Use       Mode Choice Models
    Integration                   Nested Logit Models
   Volume-Delay Curves           Zone Structure Revision
   Trip Generation               Area Typology
   External Trips                Truck Modeling
   Trip Purpose Expansion        Time of Day Modeling
                                  Peak Spreading Models
   Trip Distribution Models
                                  Regional Travel Surveys
   Destination-Choice Trip
                                  Tour-based Activity
    Distribution Models            Modeling



March 26, 2003                                               9
                 Future Needs
   Implement sub-area modeling capability
   Perform highway assignment validation for
    both volumes & speeds
   Refine heavy duty truck model
   Develop transportation-land use linkage
   Improve HOV modeling
   Link and inter-relate all modeling components
   Improve data collection for modeling
    purposes

March 26, 2003                                  10
           Short-Term Improvements
    Recalibrate trip generation & distribution
     models
    Recalibrate mode choice model
    Revise highway network assignment
       •   Multimodal Highway Network Assignment
       •   Volume-Delay Curves
       •   Peak and Off-peak Network Refinement
       •   Heavy-Duty Truck Passenger Car Equivalents
    Supplemental Improvements
       • Peak Spreading
       • External Trips
March 26, 2003                                          11
    Continuing & Future Activities
   Summarize Current Model Improvements
   Procure Short-Term Model Improvements
   Organize Model Review Panel Session
   Develop Long-Range Improvements




March 26, 2003                         12

								
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