wmata bus its project update transit signal priority

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WMATA Bus ITS Project Update Transit Signal Priority. Briefing to the Traffic Signals and Operations Working Group April 21, 2005. Presentation Outline. Signal Systems Matrix WMATA’s On-board Bus Systems Operational Concepts for TSP Priority/Preemption Detection Equipment Feedback. - PowerPoint PPT Presentation

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  • WMATA Bus ITS Project UpdateTransit Signal PriorityBriefing to the Traffic Signals and Operations Working Group

    April 21, 2005

  • Presentation OutlineSignal Systems MatrixWMATAs On-board Bus SystemsOperational Concepts for TSPPriority/Preemption Detection EquipmentFeedback

  • WMATAs Goal for TSP Improve transit performanceReduced delay at traffic signals - >> increases speed- >> reduces person delayReduced travel time variability - >> improves on-time performance - >> reduces bus bunching

  • WMATAs ChallengesSignificant challenges related to the extent of WMATAs service areaIntegration of AVL system and technical requirements of ITS system

  • WMATAs Goal* Move beyond regional demonstrations *Washington DCUnder designMontgomery County, MDCentralized Priority SystemDiscontinuedFairfax County, VADistributed SystemOperationalArlington County, VADistributed SystemOperational testing

  • Resolution #1Implementation requires cooperationSignal system must be able to handle a requestResponsibility of the traffic agencyBuses need to be equipped with technology to submit a request;Scheduling needs to take advantage of priority Responsibilities of the transit agency

  • WMATAs DirectiveDevelop a system of Conditional PriorityPriority requests tie to specific conditionsSchedule Adherence, Location, etcRequires integrated systems on-board the busNot just better for Transit, more palatable for traffic agenciesDevelop a system that can operate across jurisdictions

  • On-Board Bus Systems Orbital AVLGPS based systemCommunication via radio 2 minute poll rateMontgomery County Lesson LearnedFuture integration into scheduling system

  • On-Board Bus Systems Clever Devices IVNUses GPS Requires operator sign-onProvides:Destination signsVoice annunciationVehicle monitoringAutomated Passenger CountersCommunicates with garage wirelessly within 1,000 feet

  • On-Board Bus Systems FareboxCommunicates with garage with infraredNot integrated with other systemsCan use current ridership data to improve TSP

  • Resolution #2: Procurement Needs to Consider ITSStovepipe approach to procurementAgency suffered without an ITS architecture No consensus related to use of existing devices for new functionalitiesNo integration between new and old devicesNo recognition of standards that could reduce proprietary nature of systems

  • On-Board Bus Systems - IssuesMultiple operator sign-onMultiple GPS systemsSystems not integratedNot sharing dataNot integrated to schedule

  • Concept of OperationsAlternative #1Smart Bus Example - Portland, ORAVL and schedule is integrated on busBus requests priority at local controllerPriority Granted at local controller

  • Concept of OperationsAlternative #2Simple RequestExample - King County, WAAVL and schedule not integrated on busLocal controller contains schedule informationLocal controller detects bus and grants priority

  • Concept of OperationsAlternative #3Centralized Example - Los Angeles, CATransit Management Center and Traffic Management Center are connectedDecisions to grant priority are granted by the Traffic Management Center

  • Next Steps for WMATABus ITS planIntegration of on-board systemsImplement a proof-of-conceptConcept of Operation for TSPRecommend preferred alternativeDevelop a proof-of-conceptTest and evaluate proof-of-concept

  • Resolution #3Standards based approachUtilize NTCIP 1211 Standard to direct TSP planning for WMATA Isolate and identify the various signal improvements necessary within the jurisdictions Provide fair and equitable investment for the regional partnersUpgrade regional signal systemsInclude other local transit agencies

  • Transit Signal Priority System ComponentsSupport Systems / Management CentersAVL TechnologyTraffic Signal Systems Bus Detection Other users (emergency vehicle, other)

  • Transit Signal Priority System ComponentsSupport Systems / Management CentersAVL TechnologyTraffic Signal Systems Bus Detection Other users (emergency vehicle, other)

  • Bus Detection SystemVarious technology alternatives based on system architecture Optical detectorWayside readerInductive loopAVL-based Other

  • Optical Detection SystemCommon detection with emergency vehicle systemDetection range is easy to changeSimple request

  • Wayside Detection SystemTagAntennaTPR GeneratorTag Interface Unit for Dynamic MessageMore Equipment, Improved Range

  • NTCIP 1211 Standard Bus DetectionSuggests message should be broader than simple requestMessage could include:Estimated time to arrival (ETA)Status (lateness)Updated ETAClass of vehicle (level of priority)Other information used to make strategic decisions

  • Key Questions to AskBus Detection System Do we want one detection system regardless of cost?Where do we put the detection system, orDoes the bus know when to request priority or is that understood at the traffic signal?Maintenance and responsibility issuesReliability and latency of messagesExtent of reliance on communicationsWhat interface do we want with the bus driver?

  • Questions

    The transit signal priority system in Portland utilizes three components and I will briefly describe the components for you. Early implementation of transit signal priority in 1993 and 1995 included just the first two components of the system bus detection and traffic signal controller implementation. The utilization of AVL technology enhances the application of priority to when the time is right. It also necessitates the involvement of the schedule writers to chart the progress of the Signal Priority.The transit signal priority system in Portland utilizes three components and I will briefly describe the components for you. Early implementation of transit signal priority in 1993 and 1995 included just the first two components of the system bus detection and traffic signal controller implementation. The utilization of AVL technology enhances the application of priority to when the time is right. It also necessitates the involvement of the schedule writers to chart the progress of the Signal Priority.