METHOD OF ESTIMATING THE TRAVEL TIME OF EACH LINK WITH PRESENCE TYPE VEHICLE DETECTORS

In any Intelligent Transport System (ITS), the provision of traffic information to the road users on wheels is an important function. Of the various kinds of traffic information, travel time information is very useful to drivers, as they can roughly estimate the time required for them to get to their destination of travel based on the provided information. In Japan, the existing and predominant method of travel time information provision is to use travel time data collected mainly from image processing type Automatic Vehicle Identification (AVI) units which are located limitedly within certain roadway sections on a route. However, it was difficult to newly install enough AVI units to cover all major routes for the purpose of providing travel time information. Therefore, the Osaka Prefectural Police HQ decided to make the best use of the existing facilities for travel time provision covering a wider area, and have developed a new method of estimating the time required to travel through a link between two nodes using traffic data collected from presence type ultrasonic vehicle detectors located widely within Osaka Prefecture for signal control, congestion length measurement, etc. In this new link travel time estimation method, each link is divided into noncongested and congested parts to determine the estimated travel time of the link. Average vehicle speed and wait time by RED signal are used for the travel time estimation of its noncongested part, and the relationship of traffic volume with vehicle speed and traffic density is used for the travel time estimation of its congested part. To verify and evaluate the new method, they measured the travel times of links in the field on National Highway Route 1 in Osaka Prefecture and compared the measured data with the data estimated by this method, and found that the results of travel time estimation with the new method were favorable.

• Supplemental Notes:
  • Full conference proceedings available only on CD.
• Corporate Authors:

  ITS America

  1100 17th Street, NW, 12th Floor
  Washington, DC  United States  20036
• Authors:
  • Seki, F
  • Iwaki, S
  • Sugimura, H
• Conference:
  • Intelligent Transportation: Realizing the Future. Abstracts of the Third World Congress on Intelligent Transport Systems
  • Location: Orlando, Florida
  • Date: 1996-10-14 to 1996-10-18
• Publication Date: 1996

Language

• English

Media Info

• Pagination: n.p.

Subject/Index Terms

• TRT Terms: Automatic vehicle identification; Average travel speed; Driver information systems; Estimating; Estimation theory; Information services; Motor vehicles; Network links; Network nodes; Proximity detectors; Traffic data; Traffic density; Traffic volume; Travel time; Ultrasonics; Vehicle detectors; Waiting time
• Uncontrolled Terms: Links
• Geographic Terms: Japan
• Old TRIS Terms: Information provision; Nodes; Presence detectors
• Subject Areas: Highways; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00741644
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 23 1997 12:00AM