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Cellular Probes

Cellular Probe Feasibility Study. Cellular Probe Feasibility Study. Cellular Probes. Kansas City Evaluation. Cellular Probes. Kansas City Evaluation. Cellular Probe Feasibility Study. Project Background. Cellular Probes. Kansas City Evaluation. Overview. Project History Project Team

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Cellular Probes

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

  2. Cellular Probes Kansas City Evaluation

  3. Cellular ProbeFeasibility Study Project Background

  4. Cellular Probes Kansas City Evaluation

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

  6. 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

  7. 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.

  8. 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.

  9. Cellular Probes Kansas City Evaluation

  10. Cellular ProbeFeasibility Study Data Analysis

  11. Cellular Probes Kansas City Evaluation

  12. 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.

  13. Cellular Probes Kansas City Evaluation

  14. Cellular ProbeFeasibility Study Methodology

  15. Cellular Probes Kansas City Evaluation

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

  17. 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)

  18. Cellular Probes Kansas City Evaluation

  19. Cellular ProbeFeasibility Study Conclusions

  20. Cellular Probes Kansas City Evaluation

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

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

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

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

  25. Cellular Probes Kansas City Evaluation

  26. 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

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