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

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Presentation transcript:

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

Cellular Probes Kansas City Evaluation

Cellular Probe Feasibility Study Project Background

Cellular Probes Kansas City Evaluation

Cellular Probe Feasibility Study Overview Project History Project Team –Kansas Department of Transportation –Cellint –Kansas City Scout –Telvent Farradyne Project Funding

Cellular Probe Feasibility Study 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

Cellular Probe Feasibility Study 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.

Cellular Probe Feasibility Study 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 Probes Kansas City Evaluation

Cellular Probe Feasibility Study Data Analysis

Cellular Probes Kansas City Evaluation

Cellular Probe Feasibility Study 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 Probe Feasibility Study

Cellular Probes Kansas City Evaluation

Cellular Probe Feasibility Study Methodology

Cellular Probes Kansas City Evaluation

Cellular Probe Feasibility Study Approach Slowdown analysis –Use two algorithms –Identify slowdowns –Match slowdowns –Compare results (percent matched, average lag)

Cellular Probe Feasibility Study

Approach General characterization –Excellent, good, fair, or poor –Subjective criteria

Cellular Probe Feasibility Study 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 Probe Feasibility Study

Cellular Probes Kansas City Evaluation

Cellular Probe Feasibility Study Conclusions

Cellular Probes Kansas City Evaluation

Cellular Probe Feasibility Study Advantages No ROW required No FTEs required No DOT maintenance required Public-private partnerships Continuous coverage –Smart Work Zones Direct measure of travel times

Cellular Probe Feasibility Study Caveats Time lag –3 to 12 min Congestion sensitivity –Why? –Pro or con? –Market saturation dependant? Volume sensitivity

Cellular Probe Feasibility Study Summary Not for all applications… ATIS Travel times  Incident detection Performance measures

Cellular Probe Feasibility Study Summary Viable technology –Clearly reflects traffic Growing data source Young technology

Cellular Probes Kansas City Evaluation

Cellular Probes Kansas City Evaluation K. Mark Sommerhauser Kansas City Scout Eric Meyer, P.E., PhD Telvent Farradyne Inc K. Mark Sommerhauser Kansas City Scout Eric Meyer, P.E., PhD Telvent Farradyne Inc Cellular Probe Feasibility Study