01517496

Component

Global Positioning Systems (GPS) has emerged as the leading technology to provide location information to various location-based services. With an increasing smartphone penetration rate, as well as expanding spatial and network coverage, the idea of combining GPS positioning functions with smartphone platforms to perform GPS-enabled smartphone-based traffic data monitoring is promising, and has recently attracted much research attention. The high penetration rate of smartphones incorporated with the high location accuracy of GPS receivers will provide better estimation of locations and traffic conditions and states. This study presents a field experiment conducted along Whitemud Drive (a section of a connected vehicle test bed in Edmonton, Alberta, Canada) using a GPS-enabled smartphone, cellular positioning technique, professional GPS handset and combination of smartphones and Geo-fences. The relative positioning errors between the devices were estimated through experimental design, and evaluated in three scenarios. The results suggest that GPS-enabled smartphones are capable of correctly positioning nearly 100% of the roadway segments to Google Earth, while achieving accuracy of within or less than 5 meters for 95% of the data. Using a cellular positioning technique, cell-IDs were correctly identified in repeatable trials with accuracy levels much lower than the smartphone-GPS positioning. Using a combination of smartphone positioning and Geo-fences is promising in finding accurate positions and timestamps. In all scenarios, the use of four data sources for obtaining locations and traffic data is feasible; and particularly, using GPS-enabled smartphones and/or its combination with Geo-fences can provide better location accuracy.

This paper was sponsored by TRB committee ABJ60 Geographic Information Science and Applications.

01503729

14-1551

English

17p

2014

Transportation Research Board 93rd Annual Meeting

Digital/other

Figures; References; Tables

Automatic vehicle location; Global Positioning System; Mobile communication systems; Position fixing; Smartphones

Edmonton (Canada)

Data and Information Technology; Highways; I72: Traffic and Transport Planning

Transportation Research Board Annual Meeting 2014 Paper #14-1551

TRIS, TRB, ATRI

Jan 27 2014 2:34PM