Columbus Computerized Traffic Signal System

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1 Where have we been? Where are we today? Where are we going? Eagan L. Foster, P.E. Transportation Division Columbus Public Service Department

2 The Importance of Coordinated Traffic Signal Systems Reduce congestion Reduce accidents Reduce aggressive driver behavior Improve air quality / reduce fuel consumption Postpone or eliminate the need for construction of additional capacity Neighborhood traffic calming

3 Columbus s Coordinated Late 1950 s First capture of Federal monies Civil Defense funding Electromechanical controllers Open Loop system Cross-jurisdictional coordination in Bexley

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5 Columbus looked to improve the signal operations in the Central Business District Early 1970 s Federal money - TOPICS (Traffic Operations Program to Improve Capacity and Safety) Central Control System Coaxial Cable Interconnect and conduit Closed-circuit Cameras - funding Set model for development of future projects

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8 Columbus looked for an opportunity to capture additional funding for another signal system in the Northland area Federal money - Demonstration program Central Control System at Karl & Morse System monitored from downtown office Coaxial Cable Interconnect - aerial installation City installed field devices by force account

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10 Columbus developed a project to replace the CBD system with a system capable of handling all the traffic signals (up to 1000) in Columbus and those in other jurisdictions Early 1980 s To be constructed in two phases Federal funding Congestion Mitigation & Air Quality (CMAQ) Replace the existing CBD system Replace the 1950 s electromechanical system

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20 Phase 10 is under construction Local intersection equipment installed Summer 2002 Communications plant Installation delayed due to utility rearrangement issues Process changed three times during the project - adding 3 years to the project Additional costs to the City Now underway since June 2004

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22 Upcoming projects Phase 11 Final Tracings filed in September 2003 Was programmed for sale in January 2006 Phase 12 Design Consultant for project plan preparation Design parameters changing due to CTSS study

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26 Upcoming projects Phase 13 and Phase 14 proposed to begin replacement of portions of the system Communications infrastructure dates to 1985 New technology possible Fiber-optic Wireless Replace Central Control System Transition plan for using coaxial cable System capable of interacting with other systems

27 Closed Loop Systems City proposed the first centrally-monitored Closed Loop Federal-aid project sold in 1981 Safetran Traffic Systems Locations Hamilton Road Refugee Road Henderson Road

28 Closed Loop Systems Later Econolite TCT (Traffic Control Technologies) Current standard Econolite Zone Master Local communications Twisted pair wire or fiber optic generally being used Wireless Hamilton Rd (SR-317 near US-33) Eagle Actra Master Local communications wireless Partnership with ODOT District Six

29 Polaris Pkwy

30 Polaris Pkwy

31 New Signal Control / Management System should have the following characteristics Open Architecture Interoperable with Other Planned Regional ITS Initiatives Leverage the City s Existing Infrastructure Compatible with current controllers Operate over coaxial communications media

32 Columbus s relationship to other agencies Lead agency for coordination through CTSS Interconnect Design Operations Monitoring Of Signals On The CTSS Advise Agency Of Status Of Operation Timing In Other Jurisdictions Responsibility Of The Other Agency City Implements Timing On The System

33 Columbus s relationship to other agencies Lead agency for coordination through CTSS Maintenance Communications Infrastructure Control Cabinet Communication Equipment Agencies Current - Bexley, Franklin County, Grandview Heights, Reynoldsburg, Valleyview, Whitehall Groveport, ODOT (Closed Loop) Future - Marble Cliff, Upper Arlington

34 Columbus s relationship to other agencies Cooperative incident management with ODOT - Freeway Management System Co-location with FMS in the City s Traffic Management Center Connection to Econolite Closed Loop System at Polaris Parkway Future connection to other signal control systems

35 Columbus s relationship to other agencies Cooperative cross-jurisdictional signal coordination ODOT maintaining communications equipment for their signals and City signals in corridors US-62/SR-3 between I-270 and Brown Road SR-3 between Agler Road and Dempsey Road US-33 between Nottingham Road and Riverside Green Franklin County Cleveland Avenue between Oakland Park and Ferris Road

36 Columbus s relationship to other agencies General Maintenance Operations Agencies Columbus Airport Authority Grandview Heights Marble Cliff Ohio State University Valleyview Whitehall

37 Columbus CTSS Study MORPC contract Key Agencies - Financial Contribution - $20K each City of Columbus Franklin County Engineer Central Ohio Transit Authority Consultant Team HNTB Dave Hill, Project Manager, Arlington Virginia DLZ, Ohio Steve Jewell, Assistant Project Manager, Columbus

38 Columbus CTSS Study Final Draft Received Control & Communication Recommendations Replace Central Control System with a more Distributed System Utilize existing coax for IP Communications Utilize existing Eagle and Econolite Controllers to extend possible Construct a new Communications Network IP Communications Protocol Fiber-optic SONET Rings Resilient Packet Rings Wireless Communications to local devices

39 Columbus Computerized Traffic Signal System DIST. FIBER BACKBONE FIBER ETHERNET SWITCH 6 RPR HUB 6 ETHERNET DEVICE SERVER 5 MPEG-2 CODEC DEVICE SERVER 5 EXHIBIT 6: COMMUNICATION SYSTEM BLOCK DIAGRAM DISTRIBUTION FIBER BACKBONE FIBER SECURITY APPLIANCE ETHERNET EIA-232 NTCIP METRO- NET DEVICE SERVER 5 ETHERNET SWITCH 6 MEDIA CONVERTER ETHERNET SECURITY APPLIANCE EIA-232 NTCIP EIA-232 NTCIP ANALOG VIDEO TRANSMITTER RF MODEM 3 DEVICE SERVER 5 EXISTING COAX ETHERNET RF MODEM 3 RF MODEM 3 RF MODEM 3 RF MODEM 3 DISTRIBUTION FIBER ETHERNET SWITCH 6 MEDIA CONVERTER ETHERNET EIA-232 EIA-232 ECONOLITE EIA-232 DEVICE SERVER 5 NTCIP EAGLE RF SPLITTER/COMBINER RPR HUB 6 ANALOG VIDEO RECEIVER RF MODEM 3 EIA-232 RF MODEM 3 EIA-232 RF MODEM 3 EIA-232 RF MODEM 3 EIA-232 NTCIP CAMERA COMPUTER 4 EXISTING VIDEO SWITCH NEW CENTRAL SIGNAL COMPUTER 2 ETHERNET TMC

40 Columbus Computerized Traffic Signal System Proposed Communications Network Backbone

41 Columbus ABOUT 10 SIGNALS AT LEAST 3 SIGNALS Computerized CLOSED LOOP SYSTEM ON FIBER Traffic Signal System Proposed Communications Network CLOSED LOOP SYSTEM ON TWISTED PAIR, PLUS OTHER SIGNALS 11 SIGNALS. SEE EXHIBIT SIGNALS. SEE EXHIBIT SIGNALS. SEE EXHIBIT 10 Redesign of Phase 11 Project 9 SIGNALS AND 2 CAMERAS. SEE EXHIBIT SIGNALS AND A CAMERA. SEE EXHIBIT 8.

42 HUB ON BACKBONE FIBER RADIO ZONES MICROWAVE VIDEO LINKS HUB AT ON BACKBONE FIBER AT POLICE STRATEGIC RESPONSE UNIT DISTRIBUTION FIBER

43 Columbus CTSS Study Final Draft Received Other Recommendations Timing Plan Development Key to Success of CTSS $2,500 to $3,000 per intersection typical (by consultant) Staffing Engineering & Data Collection 75 signals per staff member» (increase from around 150 per staff member Maintenance 60 signals per technician» (increase from around 75 per tech)

44 Future Direction for CTSS Development Have Secured Congestion Mitigation/Air Quality Funding Planning Scope of Work to Include Which Features Determine Optimum Phasing Sequence Phase 13 Begin Replacement of Existing System New Central System IP Communication at Existing Locations Phase 11 Extend System with New Communications Phase 12 Extend System with New Communications Phase 14 Communications Conversion Determine Optimum Funding How Fast Can Plans Be Produced?

45 Questions? Eagan L. Foster, P.E., P.T.O.E Traffic Operations Engineer City of Columbus, Transportation Division 109 N. Front Street, Third Floor Columbus, OH (614)