|Table of Contents|

A Study on the Difference and Feature of Probe Vehicles
Data and Fixed Point Data
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《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

Issue:
2013年05期
Page:
91-97
Research Field:
电气与电子工程
Publishing date:

Info

Title:
A Study on the Difference and Feature of Probe Vehicles
Data and Fixed Point Data
Author(s):
WANG Li- xiao1 LIU Kai2 MORIKAWA Takayuki3
1. School of Civil Engineering and Architecture,Xinjiang University,Urumqi 830049,China;
2. School of Transportation and Logistics,Dalian University of Technology,Dalian 116024,China;
3. Graduate School of Environmental Studies,Nagoya University,Nagoya,464 - 8603,Japan
Keywords:
transport information multi source data difference analysis error mechanism
PACS:
U495
DOI:
-
Abstract:
Abstract: In order to explore the issue of accuracy variability of fusing probe vehicle data and fixed detector
data,the difference and feature,as well as the mechanisms,of link travel speeds which estimated from both data
are discussed,two kinds of dynamic travel speed data in Nagoya,Japan,that observed from probe vehicles and
fixed point observed VICS ( Vehicle Information Communication System) data,are compared and explored. The
consistency and differences of link travel speed estimated from two data resources are analyzed using regression
model. The influence factors are further explored. Results reveal that great differences in traffic information do exist
between two data sources,due to the main reasons such like the sample size of probe vehicle and the uncertainty in
sampled probe vehicles,the delay transmission of VICS,and the manual setting upper bound travel speeds of VICS
system. Noted that the error mechanisms for different sections are distinguished with each other,it is easy to under-
stand that using a general fusion algorithm cannot always improve fusing accuracy for all road links if ignoring errors
propagation during data collection and processing.

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Last Update: 2013-12-26