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COBB COUNTY GEORGIA PHOENIX ADAPTIVE CONTROL TECHNOLOGY SHOWCASE COBB COUNTY GEORGIA Cobb County Adaptive Traffic Control Brook Martin, Traffic Signal.

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Presentation on theme: "COBB COUNTY GEORGIA PHOENIX ADAPTIVE CONTROL TECHNOLOGY SHOWCASE COBB COUNTY GEORGIA Cobb County Adaptive Traffic Control Brook Martin, Traffic Signal."— Presentation transcript:

1 COBB COUNTY GEORGIA PHOENIX ADAPTIVE CONTROL TECHNOLOGY SHOWCASE COBB COUNTY GEORGIA Cobb County Adaptive Traffic Control Brook Martin, Traffic Signal Systems Manager Cobb County Department of Transportation September 8, 2011

2 ABOUT COBB COUNTY DEPARTMENT OF TRANSPORTATION

3 T RANSPORTATION B EST P RACTICES Cobb County Slide 3 – Phoenix Adaptive Control Technology Showcase 545 Traffic Signals 400 Direct Connect to TMC 60 CCTV Cameras 4 Changeable Message Signs 250 Miles of Fiber 1000 Video Detection Cameras Strengths Signal Timing Signal Maintenance

4 SCATS S YSTEM First Adaptive System in Georgia (2005) Cumberland CID Area I-75/I-285 Interchange 74 Intersections along 8 Corridors 332 Cabinets & 2070L Controllers Single Mode Fiber Communication Video Detection Slide 4 – Phoenix Adaptive Control Technology Showcase

5 SCATS S PECIAL E VENTS Cobb Galleria 30% Traffic Volume Increase Performing Arts Center 80% Traffic Volume Increase Cumberland Mall Seasonal Shopping Summer/Holidays Traffic Demand Reduction Slide 7 – Phoenix Adaptive Control Technology Showcase

6 SCATS F EATURES Traffic Data Collection Average Daily Traffic Volumes Turning Movement Counts Monitoring Capability Daily Operation & Daily Maintenance Slide 8 – Phoenix Adaptive Control Technology Showcase

7 SCATS B ENEFITS 24-Hour Coordinated System Detector Triggers Railroad Pre-Emption Operation Reduced Delay/Travel Times Eliminates Retiming Projects Stable Software Good Support Few Complaints Slide 9 – Phoenix Adaptive Control Technology Showcase

8 SCATS R EQUIREMENTS Signal Maintenance Program Staff Adjustment Period Equipment Cabinet Relays Video Detection Communication Slide 10 – Phoenix Adaptive Control Technology Showcase

9 SCATS F UTURE P ROJECTS Town Center CID Area 75 Intersections I-75/I-575 Corridor Communication Video Detection Slide 11 – Phoenix Adaptive Control Technology Showcase

10 SCATS C OST CUMBERLAND CID AREA (2005) Total Project - $3.7 Million 271 Cameras – 40% ($22k per intersection) SCATS – 30% ($15k per intersection) Misc. Signal Equipment – 30% TOWN CENTER CID AREA (2011) Total Project - $3.9 Million 358 Cameras - 70% ($36k per intersection) SCATS - 20% ($11k per intersection) Misc. Signal Equipment - 10% Slide 5 – Phoenix Adaptive Control Technology Showcase

11 SCATS Technology Introduction Bo Gao, P.E., PTOE

12 SCATS U.S Deployment

13 SCATS Operational Objectives Minimizes stops and overall delays True cycle-by-cycle adaptive control –Cycle –Split –Offset Optimized parameters implemented in next cycle

14 Stop Bar Presence Detection Inductive Loop Video Detection Magnetic Detection Radar Detection SCATS Operated by Looking at Space Between Vehicles Loop Space Time (secs) SCATS Data Requirements

15 Intersections Can Marry" or Divorce" Married Intersections Operate on a Common Cycle Length & Offset Plan User Defined Marriage Options: When CL's are Within 10 sec or When One-Way Volume Exceeds a Configured Threshold or When a Forced / Continuous Marriage is Required Algorithms Focus on Minimal Cycle-by- Cycle Adjustments to Stabilize Progression & Coordination SCATS Functions - Linking

16 Multiple Communications Options Serial Communications –Point-to-Point –Point-to-Multipoint Ethernet Communications –Copper –Fiber –Wireless Once per second polling and data exchange Band width - 8 kbps /per controller SCATS Communication Requirements

17 Central Server/PC –Pentium III or above processor –512 Mb RAM –40 GB hard drive SCATS Hardware Requirements

18 Field Controllers –170 E Controllers Thru Interface Card –2070s Thru Controller Software –ATC Controllers Thru Controller Software Eagle M50 Series Econolite ASC/3 SCATS hardware Requirements (Cont)

19 Field Cabinets 332 Series – 170E and 2070 Controllers NEMA TS 1 & TS2 Type 2 – 2070N and ATC Controllers NEMA TS 1 & TS2 Type 2 – 2070N and ATC Controllers NEMA TS2 Type 1 – 2070N and ATC Controllers SCATS hardware Requirements (Cont)

20 Controller/Cabinet training System training Follow-up training SCATS Training

21 Mothers Day - Sunday May 13, 2001 Sunday May 20, 2001 Ability to Accommodate Holiday Traffic Fluctuation

22 Ability to Accommodate Long-term Growth

23 Intersection Monitoring

24 Alarm Monitoring

25 Real Time - Time / Space Diagram with Integrated Detection Actuations & Theoretical Travel Time Monitoring

26 True Cycle-by-Cycle Adaptive Flexibility on detection, hardware, & communication No Advanced Detection Required Is Not Model Based No Models to Create to Run Adaptive No Models to Update for New Developments or Traffic Condition Changes Provides dynamic coordination along a corridor or corridors Real-time Alarm Monitoring & Notification SCATS Features

27 QUESTIONS? QUESTIONS? Brook Martin Cobb County DOT (770)528-4065 brook.martin@cobbcounty.org Bo Gao TransCore (480)551-4657 bo.gao@transcore.com


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