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Bluetooth BlueTOAD Technology Evaluation in Sarasota County, Florida USA

Bluetooth BlueTOAD Technology Evaluation in Sarasota County, Florida USA. Andy J. Lucyshyn, PE, PTOE Atkins North America. A presentation on the Atkins study which tested the effectiveness of BlueTOAD, a travel-time device that utilizes Bluetooth technology. Agenda.

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Bluetooth BlueTOAD Technology Evaluation in Sarasota County, Florida USA

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  1. Bluetooth BlueTOAD Technology Evaluation in Sarasota County, Florida USA Andy J. Lucyshyn, PE, PTOE Atkins North America

  2. A presentation on the Atkins study which tested the effectiveness of BlueTOAD, a travel-time device that utilizes Bluetooth technology.

  3. Agenda • Methods of travel-time data collection • Probe vs. point-based • What is BlueTOAD? • Evaluating the product: • Distribution, match rates, speeds

  4. Methods of Travel-Time Data Collection

  5. Methods of Travel-Time Data Collection • Point-based • Roadside device measures spot speed of passing cars • Spot speeds are averaged to determine travel time between points • Probe-based • Roadside device reads unique identifier and adds time stamp • Time stamp differential of those unique identifiers provide travel times

  6. What is BlueTOAD?

  7. BlueTOAD Devices Bluetooth Travel-time Origin And Destination

  8. Bluetooth Travel-Time Technology In-device (on-site) functions Off-site functions Client-access TCI = Traffic Cast International

  9. Evaluating the Product

  10. Sarasota County Test Location Test Location

  11. Study Purpose and Methodology • Test Product • Two solar/cellular BlueTOAD devices • Control • Hi-Star NC-97 Nu-Metric devices • Spot speeds • Volumes • Data collected in June 2010 • Test components • Data Distribution & Match Rate • Flow Speeds & Travel Times Fruitville Road at: Honore Ave Beneva Rd ~2 miles

  12. Data Distribution AM Peak Mid-Day Peak PM Peak

  13. Sample Size for Accurate Readings σ = 6.1 Statistical Patterns of Traffic Data and Sample Size Estimation Stanley Young, Ph.D., PE Center for Advanced Transportation Technology (CATT) University of Maryland

  14. Sample Size for Accurate Readings • Sample size (N) = (z2)(σ2)/(H2) • Z is a coefficient of confidence • Z = 1.96 at a 95% confidence level • Z = 2.475 at a 99% confidence level • σ = 6.1 (as shown previously) • H = acceptable error range • 3 mph for traffic operations • 2 mph for before and after studies

  15. Match Rates: Match Rate Criteria • Fruitville Road AADT between Honore Ave and Beneva Rd: • ~19,000 vehicles Well placed sensors: 3%-4% detection rate

  16. Match Rates

  17. Match Rates Total daily average = 3.45%

  18. Flow Speeds PM Peak AM Peak Mid-Day Peak

  19. Flow Speeds

  20. Study Conclusions Segment: 1.9 mi Avg: 42 mph Avg: 2.7 min • Distribution • Matches evenly distributed across time • Data trend was consistent with Nu-Metric devices • Any inconsistencies are in off-peak intervals • Match Rates • Achieved between 3-4% (25-36 matches per hour) • Flow Speeds • Nu-Metric vs. BlueTOAD speeds within 2 mph on average • Nu-Metric vs. BlueTOAD travel-times within 13.8 seconds on average

  21. Contact us • Andy J. Lucyshyn, PE, PTOE • Atkins North America • Andy.Lucyshyn@atkinsglobal.com • Efrain Duque, PE, PTOE • Sarasota County • eduque@scgove.net • Whitney D’Annunzio, EI • Atkins North America • Whitney.DAnnunzio@atkinsglobal.com

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