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1 Charlie Wetzel, PE, PTOE County Traffic Engineer Seminole County Florida 10/18/11.

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Presentation on theme: "1 Charlie Wetzel, PE, PTOE County Traffic Engineer Seminole County Florida 10/18/11."— Presentation transcript:

1 1 Charlie Wetzel, PE, PTOE County Traffic Engineer Seminole County Florida 10/18/11

2 Who is Seminole County? Why SynchroGreen? SynchroGreen Basics SR 436 Project Future Projects Questions Outline 210/18/11

3 County located between Orange County (Orlando), Volusia County (Daytona Beach) and Brevard County (Cocoa Beach) Population: 422,718 (2010) Area: 345 sq. miles 7 Cities Varying traffic – tourists, events, retail, business Who is Seminole County? 310/18/11

4 Traffic signals – own/partially own 240, maintain 370 (all but 7 in the County) Communications – 99% with comm., 33 signals on radio, rest on fiber (350+ miles), 4 with no comm. Detection – primarily loops, 8 with full video, 12 with partial video (adaptive project) Controller equipment – Naztec NEMA TS2, ATMS.Now central software Staff – 9 in Signal Section, 7 in Fiber Section Retiming activities – goal once every 3 years, funding: $190k from MPO, $150k from County funds ATMS Grants (MPO/FDOT) - $3M in 1999, $4M in 2011 Who is Seminole County? 410/18/11

5 Looking for alternatives to TOD plans – varying traffic, pedestrian and pre-emption issues Waiting for developments in adaptive, as opposed to going responsive Only other adaptive in the area is SCOOTS in Orange County (mixed results) Familiar with Trafficware - we use Synchro TM and SimTraffic TM Learned that Naztec and Trafficware wanted to team up and we offered to implement and test the first SynchroGreen system Why SynchroGreen? 510/18/11

6 Utilizes standard NTCIP No hardware – no “black box” or anything needing FDOT approval Uses SynchroGreen “MIB” inside the controller Adjusts signal timings based on real-time traffic Can use existing infrastructure (controllers, detection) Can turn on/off by time-of-day Will revert to time-of-day plan when off or loss of comm. Considers overall network delay; not just main street SynchroGreen Basics 610/18/11

7 Uses central Windows TM based PC or server Collects detector data from local intersections – Occupancy (stop bar detection) – Platoon behavior/distribution (free flow detection) Communications via Ethernet Performs calculations to determine optimal timing parameters Uploads timings and continues to monitor local intersections SynchroGreen Basics 710/18/11

8 Can turn on/off adaptive mode instantly Local controller setup is minimal (existing settings remain – phase and clearance times) SynchroGreen does not modify sequences; this is handled by background time of day sequences Detection: – Any reliable technology (loops, video, wireless, radar) – Stop bar All lanes must have stop bar detection – Advanced (free flow) Advanced detection on main street only Behind 85 th percentile queue SynchroGreen Basics 810/18/11

9 Splits – Phase Allocations Cycles – Periods Offsets – Start Times Optimization 910/18/11

10 Occupancy of detection zone is measured during the effective green of that phase yielding a green utilization Detector calibration factor, based on characteristics of detection zone (length, type, grade), is applied to green utilization Target (desired) phase allocation is then calculated in real-time Optimization - Phase Allocations 1010/18/11

11 11 Optimization – Periods Sample phase targets used to determine the period plan (cycle) below Note that 149 second period was selected for all locations based on the target value of the highest intersection 10/18/11

12 Adjusted based on platoon behavior/distribution using advanced detectors Transition-less adjustment Start times recalculate due to: – Period changes – Traffic flow changes Lag Time – Reacts to queues – Reacts to platoon arrival Optimization - Start Times 1210/18/11

13 SynchroGreen Balanced Mode – Minimizes network delay SynchroGreen Progression Mode – Favors progression along the corridor SynchroGreen Critical Movement Mode – Focuses on critical movements, while minimizing delay Optimization Strategies 1310/18/11

14 Interface 14 STARTUP MONITOR SETUP 10/18/11

15 Integrates with Synchro TM and SimTraffic TM Can model adaptive traffic control Calibrate adaptive settings before deployment Compare adaptive system to TOD operation Simulation 1510/18/11

16 12 Signalized Intersections on State Road 436 Previously actuated/coordinated system 1.7 miles 59,600 ADT Heavy Pedestrian Activity (>1,100 peds/day) Preemption requests (>150 requests/day) Challenging corridor to test SynchroGreen SR 436 Project 1610/18/11

17 SR 436 Deployment 1710/18/11

18 Deployed May 2011 Naztec 980 TS2 Controllers Used existing inductive loops (side streets and left turns) Installed new video detection (main street stop bar and advanced) Received in-field training on operation and calibration SR 436 Deployment 1810/18/11

19 Travel Time (AM: -6%, MD: -26%, PM: -12%) Delay (AM: -12%, MD: -42%, PM: -19%) Stops (AM: -25%, MD: -36%, PM: -20%) Side-street Delay (-19% ave. at 2 sample locations) Environmental MOEs – Fuel consumption (AM: -10%, MD: -22%, PM: -12%) – HC, CO, NOx Emissions – similar to other results All determined using Tru-Traffic, with exception of side-street (HCM) SR 436 Before/After Study 1910/18/11

20 SR 436 Results 20 AM 150 -> 142 MD 160 -> 141 PM 200 -> 155 10/18/11

21 Traffic conditions were difficult; however, SynchroGreen showed improved operations (decreased travel time, delay and stops) Greatest improvements during non-peak periods Significant improvements for pedestrian and pre- emption transitions We are still experimenting with the system. Many options haven’t been tried yet (start time modifications, different mode types, calibration using Synchro and SimTraffic) Expanding SR 436 by 4 additional signals SR 436 Project Summary 2110/18/11

22 Base price - $13,500 per intersection Initial Corridor Setup/Training – Varies depending on # signals/complexity, available Synchro models, etc. ($5k to $12k) Extras: – Additional training (estimate $7,500) – Server (estimate $8k) – Before/after studies (estimate $5k) – Detection (varies) SynchroGreen Costs 2210/18/11

23 Implementing on other corridors (Lake Mary Blvd, SR 46, CR 46A, US 17/92 and other sections of SR 436). Installing at 43 additional locations using our $4M grant Considering alternate detection methods (wireless, loops) New loop standard in the County to accommodate adaptive Working with Bluetooth technology to monitor the corridor Future Projects 2310/18/11

24 Questions or Comments 24 Charlie Wetzel, PE, PTOE 10/18/11

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