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Optimized Signal Timing Plans vs. InSync ® Adaptive Traffic Signals

Optimized Signal Timing Plans vs. InSync ® Adaptive Traffic Signals. The Results of a New Microsimulation Study by Aleksandar Stevanovic, Ph.D , PE. RhythmTraffic.com. About the Microsimulation Study.

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Optimized Signal Timing Plans vs. InSync ® Adaptive Traffic Signals

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  1. Optimized Signal Timing Plans vs. InSync®Adaptive Traffic Signals The Results of a New Microsimulation Study by Aleksandar Stevanovic, Ph.D, PE RhythmTraffic.com

  2. About the Microsimulation Study Watch the recorded webinar and download the full study at RhythmTraffic.com/StevanvoicReport Aleks Stevanovic, Ph.D, PE Florida Atlantic University

  3. Improving Signal Performance • “It’s easy to improve on a suboptimal timing plan.” • But what about optimized TOD timing plans? • How much better are adaptive signals? • Several field studies of InSync vs. optimized TOD

  4. Why Microsimulation? • Comprehensive evaluation of performance • Tightly controlled experiments • Abundance of data outputs • Repeatability • Comparability

  5. The Real Corridor Simulated • Volusia County, Florida • SR-421 • 12 intersections • ADT: 25,000-35,000 vehicles

  6. The Real Corridor Simulated • Typical suburban corridor • Difficult to retime • Seasonal and annual variations in traffic flow • Evacuation route • Divided 4-6 lane facility • Left turns • RR crossing & school zones • 35-50 mph

  7. Direct Comparison in 5 Conditions Inclement weather Regular traffic conditions Frequent rail preemption Freeway incident Shock traffic

  8. Conducting the Microsimulation • Collect data • Build modelin VISSIM • Calibrate and validate the model • Finally, TEST IT under hundreds and hundreds of hours of microsimulation using different signal timing strategies

  9. Three sets of TOD plans • SS – Single Section method • MS – Multiple Sections method • Actual signal timings in field

  10. Direct Comparison Optimized TOD Timing Plans

  11. Results

  12. Results • Very consistent results – InSync nearly always better than optimized TOD plans • Significant improvements – stops reduced up to 33%, delay reduced up to 32% • Confident conclusion that InSync is better than TOD plans

  13. Results “The results are representative— and the fact that they are representative will help traffic signal engineers to confidently make the decision to move toward adaptive traffic control systems in the future.” - Dr. Stevanovic

  14. Who’s using InSync? 80+ public agencies at 991 intersections in 25 states

  15. Learn more about these results Watch the recorded webinar and download the full study at RhythmTraffic.com/StevanvoicReport Questions, comments, more information? Eric Gannaway, Great Lakes Regional Manager Rhythm Engineering eric.gannaway@rhythmtraffic.com (586) 612-8660

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