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Overview of Transit Signal Priority Program Timeline and Key Developments

This document outlines the timeline and significant milestones of the Transit Signal Priority (TSP) Program from 2002 to 2010. Key events include the final acceptance and evaluation of Aurora Ave, software updates, a Smart Bus demonstration, and the initiation of the RapidRide program. Emphasis is placed on advancements in technology such as conditional priority systems, GPS location, and Wi-Fi communication for improved system flexibility. The insights gained from a peer visit to Los Angeles have informed the deployment strategy, enhancing transit speed and reliability in the region.

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Overview of Transit Signal Priority Program Timeline and Key Developments

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  1. Transit Signal PriorityProgram 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

  2. Existing King County TSP System • Detection • RF Tag Reader • Request • TPRG in signal cabinet • Conditional priority

  3. TSP System Reengineering Concept • Communication using Wi-Fi Technology • Location using GPS • Eliminate costly reader • Improve system flexibility 802.11 802.11

  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

  5. RapidRide ITS Architecture RapidRide ITS Architecture, with separate physical roadside interconnect IP Transport, VPN Roadside IP Network TSP Central System intersection KC WAN KC Enterprise Firewall KC Corridor Router Switch RapidRide ITS Services Wi-fi transceiver Wi-fi transceiver TPRG Wi-fi Antenna Signal Controller Wi-fi Access Pt/Bridge Passenger Info Sign

  6. Contact Information John C. Toone, MPA Senior ITS Project Manager Transit Speed & Reliability ProgramMetro Transit DivisionDepartment of Transportation 201 South Jackson Street  MS KSC-TR-0411 Seattle, WA 98104-3856 vox (206) 263-3739 / fax (206) 263-7386 john.toone@metrokc.gov

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