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Integration of Travel Demand Models and Geographic Information Systems

Integration of Travel Demand Models and Geographic Information Systems. Iowa Department of Transportation Center for Transportation Research and Education. Scope of Presentation. Brief Overview Project History Benefits of Integration Travel Demand Models Geographic Information Systems

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Integration of Travel Demand Models and Geographic Information Systems

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  1. Integration of Travel Demand Models and Geographic Information Systems Iowa Department of Transportation Center for Transportation Research and Education

  2. Scope of Presentation • Brief Overview • Project History • Benefits of Integration • Travel Demand Models • Geographic Information Systems • Interface • Analysis Tools • Richard Storm CTRE (Interface Improvements)

  3. Overview • Objective: Utilize power and flexibility of desktop GIS for development and analysis of Urban Travel Demand Models • Create: User friendly, robust interface between GIS and modeling software • Open up access to many types of data • census, employment, aerial photos, • Develop a wide variety of analysis tools • Expand visual display capabilities for public meetings

  4. Project History • 1990 GIS (ArcInfo) w/ Tranplan on Minicomputer (Nuclear Waste Program) • 1993/4 ArcInfo/Tranplan on Cray Supercomputer Server (Cray) • 1994 Unix (Clix) Workstation MGE GIS w/Tranplan on PC (FTP) (MTC/Iowa DOT) • 1995/6 TPGIS Mapinfo/Tranplan (MTC/Iowa DOT)

  5. Project History • 1996 Priority Technology Program, Develop/compare MapInfo/TP to Atlas, Maptitude and ArcView (FHWA) • 1995-8 Use of MapInfo/TP for Statewide Freight Model (Iowa DOT) • 1997-8 GIS Traffic Planning Tools (Bypass analysis, Interchange Justification) • Current Project: GIS-TP Enhancement

  6. Project History • Current Project • Designed to streamline and stabilize interface • Eliminate problems and bugs by re-programming with visual basic • Increase robustness and versatility • Create additional analysis tools

  7. Travel Demand Models • Project Utilizes Tranplan • Text File Based • Cumbersome to Build Models • TAZ Development • HNIS limitations

  8. Geographic Information Systems • Powerful Analysis and Increased Flexibility • Aids in Model Development • TAZ Delineation • Better Analysis Tools • Thematic Mapping • Aerial Photography • Other Data • Census, DWD, Land Use

  9. Collecting Data

  10. Collecting Data

  11. Aerial Photos

  12. Aerial Photos

  13. Trip Generation

  14. Trip Generation

  15. TAZ Development

  16. Geocoded Employment Data

  17. Employment Data Over Aerial

  18. Ames Central Business District

  19. Census Information

  20. Network Development

  21. Network Development

  22. Thematic Mapping

  23. Visualization Plots

  24. Visualization Plots

  25. Visualization Plot

  26. Model Validation

  27. Model Validation Assignment vs Count

  28. Model Calibration

  29. Turning Movement Diagrams

  30. Benefits of Integration • Work done primarily in GIS environment • Many processes automated • Wider variety of data sources available for model development and validation • Smooth transition between GIS and model software • Thematic mapping capabilities

  31. Interface • Previous interface was cumbersome and not very stable • Re-programming has streamlined the interface and made more user friendly. • Re-programming has increased the flexibility and stability of the interface • Lets you rejoin the process at any point without having to start all over. • More user friendly and intuitive

  32. New Analysis Tools • Screenlines • Shortest Path • O-D Desire Lines

  33. Screenlines

  34. Desire Lines and Shortest Path

  35. Richard Storm CTRE

  36. Center for Transportation Research and Education Improved ArcView/Tranplan Interface Richard Storm July 28, 1999

  37. Acknowledgements • Sponsored by the Iowa DOT • Dr. Souleyrette & Jerry Shadewald at CTRE • Stu Turner at the Des Moines Area MPO • Dr. Anderson atUniversity of Alabama in Huntsville

  38. Presentation Overview • Demonstration of Loading a Tranplan Network into ArcView with the Old and New interface • Remove programming “bugs” • Increased program flexibility

  39. Background • Old Interface • Run FORTRAN programs from MS DOS prompt • Limited Avenue scripts • User must perform repetitive tasks • New Interface • Uses Windows based Visual Basic programs • Avenue scripts perform repetitive tasks

  40. Old Interface: Step 1 Place FORTRAN programs and data files into one directory.

  41. Old Interface: Step 2 Run the FORTRAN program TP_ARC.EXE

  42. Old Interface: Step 3 Place the entire header on the first line in LINKS1.TXT

  43. Old Interface: Step 4 Start ArcView and open a TP-ARC1.AVE as a script file.

  44. Old Interface: Step 5 Open NODE.GEO and then save as a shape file. Repeat process for LINKS.GEO.

  45. Old Interface: Step 6 Add the shape files to a view.

  46. Old Interface: Step 7 Open the files LINK1.TXT & NODES1.TXT and the attributes tables for the shape files.

  47. Old Interface: Step 8 Join the text files and the attributes tables.

  48. New Interface: Step 1 Choose the proper menu item and then verify the working directory.

  49. New Interface: Step 2 Run the Visual Basic program TP_ARC.EXE.

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