TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

Reliable Range of Individual Travel Time Information in Vehicular Ad Hoc Networks

Accession Number:

01049553

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Vehicular ad hoc mobile networks are promising platforms from which decentralized traffic information systems can be built. Considerable effort has been put into designing protocols and hardware for these systems. There are important intricacies in the kinds, quantities, and reliability of the data that will drive these systems, and detailed investigations of these data issue have received less attention. Even though a decentralized traffic information system in vehicular ad hoc networks has a number of benefits compared to a centralized system, such things as sampling errors for traffic information, differences between individual data and an average of all data, would exist as implicit weak points in this innovative system. In order to observe accuracy of individual travel time data, this study examined patterns of individual travel times collected from a hypothetical ad hoc system and 5-minute averages of travel time based on results from a simulation experiment. Paramics 5.2 was applied for the simulation experiment on a segment of the Baltimore-Washington Parkway in Maryland. The research concluded that most travel times during all traffic conditions were reliable to directly use as travel time information due to low variability except when travel time abruptly increases (high variability appeared in that situation). It is not sufficient or wise to remove high-valued data, however, because the underlying congestion state plays a large role in determining the reliability of the data. The study shows simple examples of data clustering that a more sophisticated filter might build on to minimize unreliable data.

Monograph Accession #:

01042056

Report/Paper Numbers:

07-2605

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Kim, Hyoungsoo
Lovell, David J
Kim, Taehyung

Pagination:

25p

Publication Date:

2007

Conference:

Transportation Research Board 86th Annual Meeting

Location: Washington DC, United States
Date: 2007-1-21 to 2007-1-25
Sponsors: Transportation Research Board

Media Type:

CD-ROM

Features:

Figures (11) ; References (8) ; Tables (3)

Identifier Terms:

Baltimore Washington Parkway

Subject Areas:

Administration and Management; Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning

Source Data:

Transportation Research Board Annual Meeting 2007 Paper #07-2605

Files:

TRIS, TRB

Created Date:

Feb 8 2007 7:18PM