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Maximizing ‘Bang for the Buck’ Through Engineering

Innovative System Communication Design and Traffic Signal Synchronization Solutions for San Bernardino 2012 ITE District 6 Annual Conference Leo Lee, PE ADVANTEC Consulting Engineers & Philip Chu SANBAG June 27, 2012. Maximizing ‘Bang for the Buck’ Through Engineering.

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Maximizing ‘Bang for the Buck’ Through Engineering

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  1. Innovative System Communication Design and Traffic Signal Synchronization Solutions for San Bernardino 2012 ITE District 6 Annual Conference Leo Lee, PE ADVANTEC Consulting Engineers & Philip Chu SANBAG June 27, 2012

  2. Maximizing ‘Bang for the Buck’ Through Engineering • Subject – Improving Operational Efficiency of our Roadway Network • The Process – Traffic Signal Synchronization • The Project – San Bernardino County Tier 3 and 4 Traffic Signal System

  3. The Issue • Currently there are more than 272,000 traffic signals in the USA • All need signal timing updates regularly • Los Angeles ranked no. 1 in America’s Most Congested Cities (source TTI): • over 70 hours annual delay per traveler; • 366,969 excess gallons of gas • Delay, speed, fuel consumption and air pollution can be improved by:- • Synchronizing Traffic Signals • Providing traffic signal systems for agencies to monitor traffic operations

  4. The Process • Synchronizing Traffic Signals • Allows maximum operational efficiency of existing roadways • Utilizes the existing roadway capacity most effectively • Reduces delay • Reduces stops • Improves speed • Reduces gas consumption • Reduces pollutant emissions • MORE COST EFFECTIVE THAN BUILDING NEW INFRASTRUCTURE!!

  5. The Project • San Bernardino Associated Governments (SANBAG) Comprehensive Traffic Signal System • More than 1,200 traffic signals • 15 jurisdictions, including Caltrans • 545 under Tiers 1 and 2 – completed in 2009 • 678 more in Tiers 3 and 4 currently under way

  6. Tier 3 and 4 ProjectSan Bernardino County Comprehensive Traffic Signal System Colton, San Bernardino City, Highland, Loma Linda, San Bernardino County Upland, Rancho Cucamonga, Ontario Fontana, Rialto Redlands, Yucaipa, Caltrans Chino & Chino Hills, Caltrans

  7. Tier 3 and 4 ProjectSan Bernardino County Comprehensive Traffic Signal System • Background • 15 agencies have different traffic signal systems • ‘Traditional’ signal interconnect are incomplete and expensive • Need to provide ‘cheap’ solution • Answer : WIRELESS COMMUNICATION

  8. Wireless Communication Options

  9. Summary of Technology • Serial-Radios • Conform to existing communications infrastructure • Low bandwidth • Low maintenance and operations costs • Serial Radio Example • Many Cities currently use serial radios, e.g. Encom

  10. Summary of Technology • IP-Radios • Ease of management and maintenance • High bandwidth (can support CCTV) • No polling rate issues • State-of-the-art technology • IP-Radio Example • Many IP-Radios have proven to be reliable, e.g. Alvarion, Proxim, Motorola.

  11. Summary of Technology • Cellular Radio Modems • For trunk communications between master radio and TMC • For remote locations • Serial / IP Platform • Several manufacturers support both platforms, e.g. Raven XT

  12. Ethernet versus Serial Communications • Ethernet Technologies • Tremendous technological progress in the past 10 years • Many cities migrating from serial towards Ethernet • Can achieve higher bandwidth (and speed) • Can transmit video over radio • Converting Serial to Ethernet • Need terminal servers at controllers • Need virtual communications ports at TMC, or • Upgrade traffic management systems software that supports Ethernet (e.g. QuicNet Pro, Centracs)

  13. Requirements for full migration towards Ethernet 1 Upgrade to QuicNet Pro maybe planned.

  14. Requirements for full migration towards Ethernet

  15. Topography Profile • Intersections and Paths Being Analyzed • See highlighted path shown above • Topography Profiles • Shown on the bottom half of the illustration • Used to determine any land elevation obstructions

  16. Wireless Communication Path Diagrams • Equipment required • The diagrams indicate the equipment needed for each intersection • Intended to be a generic design that can be adapted to each City’s equipment selection

  17. Project Cost • 250 intersections equipped with wireless comm. • 150 intersections with new controllers • 87 cellular modems • Hardware upgrade = $4M • Average cost = $16,000/intersection

  18. Questions??

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