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MMTIS Probe Data Evaluation

MMTIS Probe Data Evaluation. Presented by Stanley E. Young 6/3/07. Initial Analysis of Cellular Data. Duration: 21 days, from 2006 Jan 26 th , 12:00 am to 2006 Feb 2 nd 11:55 pm. (MMTIS continued until Feb 26, 2006) Coverage: Given Road Network: 637 nodes, 1274 links.

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MMTIS Probe Data Evaluation

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  1. MMTIS Probe Data Evaluation Presented by Stanley E. Young 6/3/07

  2. Initial Analysis of Cellular Data • Duration: 21 days, from 2006 Jan 26th, 12:00 am to 2006 Feb 2nd 11:55 pm. (MMTIS continued until Feb 26, 2006) • Coverage: • Given Road Network: 637 nodes, 1274 links. • Available in Cellular Probe Data: 595 nodes, 553 links in direction 0 and 554 links in direction 1, 1107 links in total.

  3. Comparison of Link Speeds by Route

  4. Results by Percent Absolute Speed Error

  5. Relationship to LOS

  6. Comparison with Speed DataI-695 outer loop @ US 40 West

  7. I-695 inner loop @ I-70

  8. I-695 Inner Loop @ Joppa Rd

  9. Comparison of Costs (from independent study) • Conventional Detection • Freeway installation costs estimated at $26,000 per mile (including comm.) • Annual maintenance costs approximately 10% of installation cost (some have experienced higher costs) • Probe-based Technology • Start-up costs estimated at $2,000 to $10,000 per mile • Costs could be further reduced with cost-sharing • Conclusion: Probe-based technology could be less than 1/10th the cost of conventional detection

  10. Evaluation Results – Interpretations • Accuracy and cost of cellular data on freeways useful for many traffic applications • Utility of arterial data is still unproven • Small sample size for evaluation • Estimation of speeds when data is unavailable • Combining probe data with GPS data may be best approach

  11. Probe Data Applications • Coverage of large areas and (possibly) many roadway types • Help satisfy the provisions of Safetea-Lu Sec.1201 • Improved traveler information (e.g. travel times on DMS, 511, websites) • Improved traffic management (alternate routing, decision support tools) • Improved performance measurement • Improved planning and engineering

  12. Data Quality from InfoStructure

  13. Closing Thoughts • Probe data including cellular data is a cost-effective technology • Accuracies adequate for traveler information and many traffic management applications • The challenge is to take advantage of probe data’s potential

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