Cellular Probes

Cellular Probe Feasibility Study Cellular Probe Feasibility Study Cellular Probes Kansas City Evaluation

Cellular Probes Kansas City Evaluation

Cellular ProbeFeasibility Study Project Background

Overview • Project History • Project Team • Kansas Department of Transportation • Cellint • Kansas City Scout • Telvent Farradyne • Project Funding

KDOT Goals • Determine the general feasibility of the cell probe technology. • Determine possible applications for the cell probe average speed data. • Incident detection • Speed mapping • Travel times • Performance measures

Project Timeline • January 2006 – Discussions begin between KDOT and Cellint. • February 2006 – Scout begins providing speed data to Cellint. • March 2006 – Cellint creates a website with speed bands.

Project Timeline (Cont.) • June through August, 2006 – Cellint provides blind speed data along the I-435 study corridor. • Winter 2006/2007 – Scout analyzes the blind test data and produces a preliminary report. • Summer 2007 – Final report to be completed.

Cellular ProbeFeasibility Study Data Analysis

Analysis Overview • General Feasibility Analysis Review how the Cellint speed bands change during accidents and construction lane closures. • Detailed Speed Data Analysis Cellint provides blind cell probe speed data so Scout can perform an independent study.

Cellular ProbeFeasibility Study Methodology

Approach • Slowdown analysis • Use two algorithms • Identify slowdowns • Match slowdowns • Compare results (percent matched, average lag)

Approach • Category analysis • Binned speeds (from ATMS) • <25mph (red) • 25-35mph (yellow) • >35mph (green) • Compared bin for each time interval • R=R, Y=Y, and (R+Y)=(R+Y)

Cellular ProbeFeasibility Study Conclusions

Advantages • No ROW required • No FTEs required • No DOT maintenance required • Public-private partnerships • Continuous coverage • Smart Work Zones • Direct measure of travel times

Caveats • Time lag • 3 to 12 min • Congestion sensitivity • Why? • Pro or con? • Market saturation dependant? • Volume sensitivity

Summary • Not for all applications… • ATIS • Travel times • Incident detection • Performance measures

Summary • Viable technology • Clearly reflects traffic • Growing data source • Young technology

Cellular Probe Feasibility Study K. Mark Sommerhauser Kansas City Scout karsten.sommerhauser@modot.mo.org Eric Meyer, P.E., PhD Telvent Farradyne Inc eric.meyer@telvent.abengoa.com Cellular Probes Kansas City Evaluation

Cellular Probes

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