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 DOT Assets / Infrastructure +160 county staff (23 Signals) 2nd largest transit agency in the state and avg. of 380K riders/month. County Airport was ranked the 200th busiest airport in the country last 10 years.

Transportation Best Practices 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 Manage 545 signals, 61 CCTV cameras, 4 Changeable Message Signs and over 200 miles of fiber optic cable. Responsible for Signal Timing, Signal Design, Signal Maintenance, TMC Operation Annual budget of $500,000 Video detection 2070 controllers Retime every 3 years Slide 3 – Phoenix Adaptive Control Technology Showcase

First Adaptive System in Georgia (2005) Cumberland CID Area 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 We can’t keep widening roads, so we squeeze as much capacity out of our existing transportation infrastructure Slide 4 – Phoenix Adaptive Control Technology Showcase

Performing Arts Center 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

Traffic Data Collection 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

24-Hour Coordinated System Detector Triggers 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

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

Town Center CID Area 75 Intersections I-75/I-575 Corridor SCATS Future Projects Town Center CID Area 75 Intersections I-75/I-575 Corridor Communication Video Detection Today: We just awarded an expansion of our adaptive system in the Town Center Area. Shopping, interstate, Kennesaw State University events. Slide 11 – Phoenix Adaptive Control Technology Showcase

Total Project - $3.7 Million 271 Cameras – 40% ($22k per intersection) 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% SCATS Cost 9 year return on investment. Includes re-cutting loops twice and re-timing signals 3 times Slide 5 – Phoenix Adaptive Control Technology Showcase

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

SCATS U.S Deployment

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

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)

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

SCATS Communication Requirements 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 16

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

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

SCATS hardware Requirements (Cont’) 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

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

Ability to Accommodate Holiday Traffic Fluctuation Mother’s Day - Sunday May 13, 2001 Sunday May 20, 2001

Ability to Accommodate Long-term Growth

Intersection Monitoring

Alarm Monitoring

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

SCATS Features 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

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