T3 Webinar Presentation

Lessons Learned: Improving Reliability with Transit Signal Priority Systems -
King County Metro Transit and Los Angeles County MTA (January 22, 2008)

Presenter:   John Toone
Presenter's Org:   King County Metro

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T3 Webinars are brought to you by the ITS Professional Capacity Building Program (ITS PCB) at the U.S. Department of Transportation's (USDOT) ITS Joint Program Office, Research and Innovative Technology Administration (RITA)

Slide 1: Transit Signal Priority Program Timeline, cont’d

  • 2002 – Final acceptance & Aurora Ave. evaluation
  • 2002 – Software Updates contract
  • 2003 – Smart Bus demonstration
  • 2004 – Reengineering concept development and research
  • 2006 – Peer Visit to LA
  • 2007 – OBS contract signed, RapidRide (BRT) program begun
  • 2010 – First RapidRide corridor in service

Slide 2: Existing King County TSP System

  • 1991 – Rainier Ave HOV study recommends demonstration of Transit Signal Priority
  • 1993 – Regional Oversight Committee formed
  • 1994-1996 – RFI, RFP, Contract Award
  • 1997 – System design approved
  • 1999 – Rainier Ave installation
  • 2000 – Aurora Ave installation
  • 2002 – Final acceptance & Aurora Ave evaluation

[Diagram that shows existing King Country TSP system. Shows location of signal priority equipment installed around the intersection. Installed equipment consists of 1) antenna, 2) reader, 3) traffic signal controller, 4) lonworks to interface unit. Diagram shows bus with a transponder traveling through the intersection, activating the signal priority system. ]

Slide 3: TSP System Reengineering Concept

  • Communication using Wi-Fi Technology
  • Location using GPS
  • Eliminate costly reader
  • Improve system flexibility

[Slide shows same intersection diagram as shown in slide 3 with a reengineered concept of the TSP system. In this system, the reader has been replaced by 802.11 wireless communications. ]

Slide 4: LA Peer Visit Key Findings

  • 802.11 WiFi appropriate for vehicle-to-roadside communications
  • Latency issues are resolvable
  • Communication Network O&M access will be critical

The network can be more than just a detection system

Slide 5: RapidRide ITS Architecture

[Complex diagram of RapidRide ITS Architecture with separate physical roadside interconnect. ]

Slide 6: Contact Information

John C. Toone, MPA
Senior ITS Project Manager
Transit Speed & Reliability Program

Metro Transit Division Department of Transportation
201 South Jackson Street MS KSC-TR-0411
Seattle, WA 98104-3856
vox (206) 263-3739 / fax (206) 263-7386

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