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1. Green Lights Program Objectives Improve Quality of Synchronization in a Short Timeframe Noticeable Improvements to Motorists Appropriate Allocation.

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Presentation on theme: "1. Green Lights Program Objectives Improve Quality of Synchronization in a Short Timeframe Noticeable Improvements to Motorists Appropriate Allocation."— Presentation transcript:

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2 Green Lights Program Objectives Improve Quality of Synchronization in a Short Timeframe Noticeable Improvements to Motorists Appropriate Allocation of Green Time Less Stops and Delays Fuel Savings and Environmental Benefits

3 What is Traffic Synchronization? A Mathematical Method of Optimizing the Movement of Vehicles Along a Roadway or Network Signal Cycle Length (Typically seconds) Allocation of Green Time to Different Phases (Splits) Timed Stop & Release between Intersections (Offsets)

4 4 Average-Quality Signal Progression

5 5 High-Quality Signal Progression (Goal)

6 Already Retimed over 950 Intersections: All Major E/W & N/S Corridors Future Areas (In Blue) Require Additional Equipment to Coordinate Signals 6

7 Green Lights Retiming Initial Benefits: Delay Reduction: 15% - 42% Reduction in Stops: 10% - 32% Improved Travel Times: 10% - 43% $14.4 Million/Year Fuel Saved 300,000 Metric Tons GHG Emissions Reduced Positive Feedback from Motorists… 7 …on University Drive… I COULD NOT BELIEVE IT! I went from Southgate Blvd to Broward Blvd, an 8 mile stretch, cruising without stopping. It has never happened in my 22 years of driving on that road!!! - P. Veliyathil

8 8 Next Corridor Retiming Steps: Our work has just begun…program will continue into the foreseeable future… Continuous Refinements Troubleshoot Congestion Hotspots Integrate Minor and Off-System Intersections Enhanced Field Maintenance Traffic-Responsive & Adaptive Systems

9 Re-timing of Intersecting Roads will be More Complicated… Ultimate Goal: Complex N/S & E/W Cross-Progression: Basketweave 9 Next Corridor Retiming Steps (Contd):

10 Related Efforts: Modernization of the Countywide Signal System (SEI Program) 10

11 New Signal Control Software Will Improve System Performance More Flexible Timing Patterns More Reliable – Local Control at Intersections Remote Monitoring at TMC in Real-Time Enhanced Incident Management Improved Priority Operation for Transit Buses (TSP) 11

12 Hybrid Deployment of Technologies will Minimize Costs Digital Communications Network Required Multiple Interoperable Options Now Available Digital-Over-Copper Wireless Cellular Fiber Optics 12

13 New Software Implementation Schedule Operational at over 200 Intersections Today Convert 400 More Intersections by end of 2013 Remaining 675 Intersections by end of 2015 Total to be Upgraded = 1,275 13

14 New Software Implementation Includes the Following: Digital-Over-Copper Network Switches/Routers Signal Timing Database Conversion Some Copper Cable Replacement w/ Fiber Optics Replacement of Existing 23 Year Old Mainframe Cost = $20+ Million Over Next 4 Years 14

15 Timing is Everything… Questions? 15 (954)


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