METHOD OF MEASURING TRAVEL TIME BY USING ULTRASONIC VEHICLE PROFILE CLASSIFIERS. SECOND INTERNATIONAL CONFERENCE ON ROAD TRAFFIC MONITORING

This article described a new travel time prediction system which measures the time used by vehicles to travel a certain section of road, and a field experiment conducted to test it. The system identified special vehicles at the entrance and the exit of a section of road with ultrasonic vehicle classifiers. A transducer mounted directly above the road transmitted downward cyclic ultrasonic pulses onto vehicles passing directly below it. Vehicles used to measure travel time were distinguished by obtaining data about their dimensions (height and shape) by means of 2 ultrasonic transducers positioned at the entrance and exit of the section of road being monitored. The times at which each vehicle (a) entered and (b) exits from the road section being monitored were recorded. Travel time was calculated by subtracting entrance time from exit time. Two methods of measuring travel time tested: (a) one which used any type of vehicle as the marker vehicle and (b) one that used large lorries only. The system was tested on sections of a busy urban three lane highway. Method (a) was tested on a 2360 km section between Bijogi Tnd tajima, and method (b) on the 1550 m section between Bijogi and the Tajima-Danchi intersections. These tests showed that the system was capable of measuring mean travel time on a section of road up to 2 km length, including sections with intersections. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0852963734
• Corporate Authors:

  Institution of Electrical Engineers

  Savoy Place
  London WC2R 0BL, NY  England  10016-5997
• Authors:
  • Sumi, H
  • TAKAHASHI, H
  • Izumi, T
  • KIRYU, N
  • Matsumoto, W
• Publication Date: 1989

Media Info

• Features: References;
• Pagination: p. 29-32
• Serial:
  • Publication of: INSTITUTION OF ELECTRICAL ENGINEERS
  • Publisher: Institution of Electrical Engineers
  • ISSN: 0537-9989

Subject/Index Terms

• TRT Terms: Automation; Classification; Conferences; Height; Size; Traffic surveys; Travel time; Trip length; Vehicles
• ITRD Terms: 3882: Automatic; 8513: Classification; 8525: Conference; 9014: Dimension; 6489: Height; 697: Journey time; 676: Traffic survey; 1255: Vehicle
• Subject Areas: Highways; Operations and Traffic Management; Vehicles and Equipment;

Filing Info

• Accession Number: 00493045
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-85296373-4
• Files: ITRD, TRIS
• Created Date: May 31 1990 12:00AM