TRAFFIC PROJECTION AND ASSIGNMENT

TWO TRAFFIC ASSIGNMENT PACKAGES WERE DEVELOPED FOR USE ON THE TEXAS HIGHWAY DEPARTMENT'S IBM 360/50 COMPUTER SYSTEM. THE TEXAS SMALL NETWORK PACKAGE, WHICH WILL ACOMMODATE SMALL NETWORKS OF UP TO 4,000 NODES, IMPLEMENTS A NEW ALGORITHM WHICH ALLOWS THE TREES TO BE BUILT AND THE NETWORK SIMULTANEOUSLY LOADED. THE TEXAS LARGE NETWORK PACKAGE, WHICH WILL ACCOMMODATE A NETWORK OF UP TO ABOUT 16,000 NODES, USES A NEW MINIMUM PATH ALGORITHM WHICH IS CONSIDERABLY MORE EFFICIENT THAN ANY PREVIOUSLY USED. COMPUTER PROGRAMS FOR TRIP DISTRIBUTION WERE DEVELOPED FOR USE. THE ACCURACY OF EMPLOYMENT AND NONHOME TRIP ENDS FROM HOME INTERVIEWS WAS INVESTIGATED. ALSO THREE METHODS FOR ESTIMATING EMPLOYMENT WERE COMPARED. THE ACCURACY OF ALL-OR- NOTHING TRAFFIC ASSIGNMENTS IN ESTIMATING TURN MOVEMENTS WAS INVESTIGATED FOR DESIGN AND PLANNING PURPOSES. A PRELIMINARY ANALYSIS OF HOME INTERVIEW DATA INDICATES THAT VERY HIGH SAMPLING RATES ARE NECESSARY IN ORDER TO ESTIMATE THE NUMBER OF TRIPS WITH A SMALL CONFIDENCE LIMIT. /AUTHOR/

• Supplemental Notes:
  • RESEARCH REPORT 119-3F
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011
• Authors:
  • Stover, V G
  • Benson, J D
• Publication Date: 1971-9

Media Info

• Features: Figures; Tables;
• Pagination: 72 p.

Subject/Index Terms

• TRT Terms: Computer programs; Computers; Employment; Estimates; Traffic assignment; Turning traffic
• Uncontrolled Terms: Turning movements
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00228185
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Aug 7 1972 12:00AM