METHOD FOR PREDICTING TRAVEL TIME AND OTHER OPERATIONAL MEASURES IN REAL-TIME DURING FREEWAY INCIDENT CONDITIONS

THIS PAPER PRESENTS THE DEVELOPMENT OF A METHOD FOR PREDICTING THE TRAVEL TIME REQUIRED BY A METORIST TO TRAVEL FROM ANY SELECTED FREEWAY LOCATION TO THE END OF THE FREEWAY SYSTEM DURING INCIDENT CONDITIONS. IT IS PREDICTIVE IN THAT IT COMPUTES AN ESTIMATE OF A MOTORIST'S TRAVEL TIME IF HE WERE TO ENTER THE FREEWAY SEVERAL MINUTES IN THE FUTURE. SPEEDS, VOLUMES, AND OTHER OPERATIONAL MEASURES CAN BE PREDICTED ALSO. THESE CALCULATIONS ARE MADE IMMEDIATELY AFTER THE INCIDENT IS DETECTED AND THE NECESSARY OPERATIONAL MEASURES HAVE BEEN EVALUATED. SPEEDS OF THE VARIOUS SHOCK WAVES AND TRAVEL-TIME RESULTS ARE ALSO PRESENTED. THE MODEL WAS DEVELOPED FOLLOWING THE KINEMATIC WAVE THEORY OF LIGHTHILL AND WHITHAM FOR POSSIBLE USE IN AN OPERATIONAL CONTROL STRATEGY OF VARIABLE-MESSAGE SIGNS WHEREBY MOTORISTS WOULD BE DIVERTED TO ALTERNATE ROUTES IF CONDITIONS ON THE FREEWAY RELATIVE TO SELECTED ALTERNATE ROUTES JUSTIFIED THE DIVERSION. THE MODEL COULD ALSO BE USED TO PREDICT QUEUE BACKUPS AND DELAYS DUE TO LANE CLOSURES CAUSED BY SCHEDULED MAINTENANCE OPERATIONS. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1973/461/461-001.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309021944
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Effectiveness of Operational Measures. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Messer, Carroll J
  • Dudek, Conrad L
  • Friebele, John D
• Discussers:
  • Gordon, Robert L
  • Wattleworth, Joseph A
  • Reilly, Eugene F
• Conference:
  • 52nd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1973-1-22 to 1973-1-26
• Publication Date: 1973

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 1-16
• Monograph Title: Effectiveness of traffic operational measures
• Serial:
  • Highway Research Record
  • Issue Number: 461
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Calculation; Forecasting; Freeways; Kinematics; Maintenance practices; Mathematical models; Methodology; Queuing theory; Rearview mirrors; Speed; Traffic crashes; Traffic diversion; Traffic volume; Travel time; Variable message signs
• Uncontrolled Terms: Computation; Models
• Old TRIS Terms: Freeway traffic accidents; Queueing theory; Rear view
• Subject Areas: Highways; Maintenance and Preservation; Operations and Traffic Management;

Filing Info

• Accession Number: 00226829
• Record Type: Publication
• ISBN: 0309021944
• Files: TRIS, TRB
• Created Date: May 15 1974 12:00AM