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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

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

transportation best practices
Cobb CountyTransportation 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

scats system
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

scats special events
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

scats features
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

scats benefits
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

scats requirements
SCATS Requirements

Signal Maintenance Program

Staff Adjustment Period

Equipment

Cabinet Relays

Video Detection

Communication

Slide 10 – Phoenix Adaptive Control Technology Showcase

scats future projects
SCATS Future Projects

Town Center CID Area

75 Intersections

I-75/I-575 Corridor

Communication

Video Detection

Slide 11 – Phoenix Adaptive Control Technology Showcase

scats cost
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

scats operational objectives
Minimizes stops and overall delays
  • True cycle-by-cycle adaptive control
    • Cycle
    • Split
    • Offset
  • Optimized parameters implemented in next cycle
SCATS Operational Objectives
slide14

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)

slide15

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
slide16
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

slide17
Central Server/PC

Pentium III or above processor

512 Mb RAM

40 GB hard drive

SCATS Hardware Requirements

slide18
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’)

slide19
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

slide20
Controller/Cabinet training

System training

Follow-up training

SCATS Training

slide21

Ability to Accommodate Holiday Traffic Fluctuation

Mother’s Day - Sunday May 13, 2001

Sunday May 20, 2001

slide25

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

slide26
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

slide27

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