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Transportation Research Board 2004 Annual Meeting

Transportation Research Board 2004 Annual Meeting. Adaptive Signal Control Workshop Session 2: Field Experience January 11, 2004. Orange County SCOOT System. By: Hazem El-Assar, P.E. Presentation Outline. Background Challenges Potential Solutions Why SCOOT? Project Description

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Transportation Research Board 2004 Annual Meeting

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  1. Transportation Research Board2004 Annual Meeting Adaptive Signal Control Workshop Session 2: Field Experience January 11, 2004

  2. Orange County SCOOT System By: Hazem El-Assar, P.E.

  3. Presentation Outline • Background Challenges • Potential Solutions • Why SCOOT? • Project Description • Benefits Achieved • Difficulties Faced • Lessons Learned

  4. Background Challenge #1High Traffic Congestion

  5. Background Challenge #2Convention Center Events

  6. Background Challenge #3Convention Center Expansion

  7. OCCC Expansion Facts • 3 million square foot complex: • 2.1 million s.f. of exhibition space • 166,050 s.f. of meeting rooms • 92,000 s.f. of general assembly space • 3,600 parking spaces • Total cost $748 million • Opened November 2003 MULTIPLE EVENTS UP TO 80,000 ATTENDEES EACH

  8. OCCC New Building

  9. Background Challenge #4 Unpredictable Tourist Traffic

  10. Background Challenge #5Closely Spaced Signals

  11. Potential Solutions • Free uncoordinated signals • Officer traffic control • TOD signal coordination • Traffic Responsive Plans • Adaptive Signal Control

  12. SCOOT Adaptive Signal Control plit S C ycle ffset O ptimization O T echnique

  13. Why SCOOT? • Uses real-time upstream flow to adjust timing • Better suited for high volume minor movements • Widely used worldwide since 1981 • Compatible with County’s existing Eagle signal controllers • No need for additional field staff training • More cost effective installation under current conditions

  14. Vehicle Detector Local Controller Central Computer How SCOOT Works

  15. Central Computer • SCOOT server • DEC Alpha running VMS • Operator workstations • PC running Windows • LAN connected via X-Windows emulation • Remote dial-ins via terminal servers • Interface to existing network and workstations using MONARC (now ACTRA)

  16. Communication System • Transmission Media • County-owned fiber optic on arterial streets • FDOT fiber optic on I-4 • Communications Methodology • Single Mode fiber optic • Multi Mode fiber optic

  17. Local Controllers • Existing cabinets • New Eagle EPAC 300 controllers with SCOOT module • Dedicated communication unit • SCOOT detectors

  18. Phase III Phase I Phase II Project Location • General location: • International Drive • Universal Boulevard • Primarily Serving: • Convention Center • Parking Garages • Hotels & Restaurants • Tourist Attractions

  19. Project Schedule • Phase I: May 2000 • 7 New Signals • Phase II: November 2001 • 6 New Signals • Phase III: October 2003 • 4 New Signals • 2 Modified Signals

  20. Project Scope • Replace existing controllers • Install fiber optic communications • Install loop detectors • Provide central hardware and software • Setup and validate the system • Design system maps and intersection graphics • Provide training to County staff

  21. Project Costs • Controller Upgrades $2,500 - $5,000/ intersection • Detectors $10,000-15,000/ intersection • Communications $2,500-$5,000/ intersection • System Configuration, $5,000-$7,500/ Validation, Fine Tuning intersection • Central Hardware/Software $50,000

  22. Operational Benefits Achieved • Convention Center traffic ingress & egress has been cleared efficiently • Overall travel times and delays have been reduced • Officer control of signals is no longer necessary • Regular development and update of timing plans is not necessary • Timing adjustment during long or short term lane closures is not necessary • Real-time traffic data are monitored and archived

  23. Annual Cost Comparison • Detectors +$1,000/intersection • Support Agreement +$34,000 • Central System $0 • Controllers $0 • Communications $0 • Staff $0 • Manual Traffic Control -$450,000 Net Annual Savings ~$400,000

  24. Difficulties Faced • No detectors on short links • Long pedestrian phases • Non-flexible phasing sequence • Low volume traffic conditions • Non-optimal signal progression • Insufficient staff experience • Only remote technical support

  25. Lessons Learned • TOD plans may provide better progression for recurring traffic conditions • Negative impacts may occur in low volume traffic conditions • Pre-determine optimal phasing based on traffic conditions or using other software • Place detectors on all lanes, if possible • Avoid long pedestrian crossings

  26. Thank You! Hazem El-Assar, P.E. Senior Engineer Orange County Traffic Engineering 4200 S John Young Pkwy Orlando, FL 32839 Ph: (407) 836-7866 Fx: (407) 836-7825 E-mail: hazem.el-assar@ocfl.net

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