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Phoenix Adaptive Control Technology Showcase Cobb County Georgia PowerPoint PPT Presentation


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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. About Cobb County Department of Transportation. Cobb County.

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Phoenix Adaptive Control Technology Showcase Cobb County Georgia

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Phoenix adaptive control technology showcase cobb county georgia l.jpg

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


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About Cobb County Department of Transportation


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Cobb County

Transportation Best Practices

  • 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

Slide 3 – Phoenix Adaptive Control Technology Showcase


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SCATS System

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


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SCATS Special Events

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


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SCATS Features

Traffic Data Collection

Average Daily Traffic Volumes

Turning Movement Counts

Monitoring Capability

Daily Operation & Daily Maintenance

Slide 8 – Phoenix Adaptive Control Technology Showcase


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SCATS Benefits

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


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SCATS Requirements

Signal Maintenance Program

Staff Adjustment Period

Equipment

Cabinet Relays

Video Detection

Communication

Slide 10 – Phoenix Adaptive Control Technology Showcase


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SCATS Future Projects

Town Center CID Area

75 Intersections

I-75/I-575 Corridor

Communication

Video Detection

Slide 11 – Phoenix Adaptive Control Technology Showcase


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SCATS Cost

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


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SCATS Technology Introduction

Bo Gao, P.E., PTOE


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SCATS U.S Deployment


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  • Minimizes stops and overall delays

  • True cycle-by-cycle adaptive control

    • Cycle

    • Split

    • Offset

  • Optimized parameters implemented in next cycle

SCATS Operational Objectives


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SCATS Data Requirements

  • Stop Bar Presence Detection

    • Inductive Loop

    • Video Detection

    • Magnetic Detection

    • Radar Detection

  • SCATS Operated by Looking at “Space” Between Vehicles

  • Loop

    Space Time (secs)


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    SCATS Functions - Linking

    • 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


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    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


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    Central Server/PC

    Pentium III or above processor

    512 Mb RAM

    40 GB hard drive

    SCATS Hardware Requirements


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    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’)


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    • Field Cabinets

    SCATS hardware Requirements (Cont’)

    332 Series –170E and 2070 Controllers

    NEMA TS 1 & TS2 Type 2 –

    2070N and ATC Controllers

    NEMA TS2 Type 1 – 2070N and ATC Controllers


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    Controller/Cabinet training

    System training

    Follow-up training

    SCATS Training


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    Ability to Accommodate Holiday Traffic Fluctuation

    Mother’s Day - Sunday May 13, 2001

    Sunday May 20, 2001


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    Ability to Accommodate Long-term Growth


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    Intersection Monitoring


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    Alarm Monitoring


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


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    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


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    QUESTIONS?Brook Martin Cobb County DOT (770)528-4065 [email protected] Bo GaoTransCore(480)[email protected]


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