Hartford Area ITS Architecture Update

Element Expanded Functional Requirements: Municipal Traffic Operations Center

Functional Area: Collect Traffic Surveillance
  1. The center shall monitor, analyze, and store traffic sensor data (speed, volume, occupancy) collected from field elements under remote control of the center.
  2. The center shall monitor, analyze, and distribute traffic images from CCTV systems under remote control of the center.
  3. The center shall monitor, analyze, and store multimodal crossing and high occupancy vehicle (HOV) lane sensor data under remote control of the center.
  4. The center shall distribute road network conditions data (raw or processed) based on collected and analyzed traffic sensor and surveillance data to other centers.
  5. The center shall respond to control data from center personnel regarding sensor and surveillance data collection, analysis, storage, and distribution.
  6. The center shall maintain a database of surveillance equipment and sensors and associated data (including the roadway on which they are located, the type of data collected, and the ownership of each )
  7. The center shall support an interface with a map update provider, or other appropriate data sources, through which updates of digitized map data can be obtained and used as a background for traffic data.
Functional Area: HRI Traffic Management
  1. The center shall remotely control highway-rail intersection (HRI) equipment located in the field.
  2. The center shall accept collect highway-rail intersection (HRI) advisory or alert data from rail operations centers.
  3. The center shall collect highway-rail intersection (HRI) equipment operational status and compare against the control information sent by the center.
  4. The center shall provide the highway-rail intersection (HRI) equipment operational status to rail operations centers.
  5. The center shall collect incident information related to a highway-rail intersection (HRI), such as intersection blockages or crashes or equipment malfunctions.
  6. The center shall implement control plans to coordinate signalized intersections around highway-rail intersections (HRI), under control of center personnel, based on data from sensors and surveillance monitoring traffic conditions, incidents, equipment faults, pedestrian crossings, etc.
Functional Area: TMC Traffic Metering
  1. The center shall remotely control systems to manage use of the freeways, including ramp, interchange, and mainline metering.
  2. The center shall collect operational status from ramp meters, interchange meters, and mainline meters and compare against the control information sent by the center.
  3. The center shall collect fault data from ramp meters, interchange meters, and mainline meters.
  4. The center shall implement control strategies, under control of center personnel, on some or all of the freeway network devices (e.g. ramp meters, interchange meters, and mainline meters), based on data from sensors monitoring traffic conditions upstream, downstream, and queue data on the approaches to the meters.
Functional Area: TMC Incident Detection
  1. The center shall receive inputs from the Alerting and Advisory System concerning the possibility or occurrence of severe weather, terrorist activity, or other major emergency, including information provided by the Emergency Alert System.
  2. The center shall collect and store traffic flow and image data from the field equipment to detect and verify incidents.
  3. The center shall receive inputs concerning upcoming events that would effect the traffic network from event promoters and traveler information service providers.
  4. The center shall exchange incident and threat information with emergency management centers as well as maintenance and construction centers; including notification of existence of incident and expected severity, location, time and nature of incident.
  5. The center shall support requests from emergency management centers and border inspection systems to remotely control sensor and surveillance equipment located in the field.
  6. The center shall provide road network conditions and traffic images to emergency management centers to support the detection, verification, and classification of incidents.
  7. The center shall provide video and traffic sensor control commands to the field equipment to detect and verify incidents.
Functional Area: TMC Incident Dispatch Coordination/Communication
  1. The center shall exchange alert information and status with emergency management centers. The information includes notification of a major emergency such as a natural or man-made disaster, civil emergency, or child abduction for distribution to the public. The information may include the alert originator, the nature of the emergency, the geographic area affected by the emergency, the effective time period, and information and instructions necessary for the public to respond to the alert. This may also identify specific information that should not be released to the public.
  2. The center shall coordinate planning for incidents with emergency management centers - including pre-planning activities for disaster response, evacuation, and recovery operations.
  3. The center shall support requests from emergency management centers to remotely control sensor and surveillance equipment located in the field, provide special routing for emergency vehicles, and to provide responding emergency vehicles with signal preemption.
  4. The center shall exchange incident information with emergency management centers, maintenance and construction centers, transit centers, information service providers, and the media including description, location, traffic impact, status, expected duration, and response information.
  5. The center shall share resources with allied agency centers to implement special traffic control measures, assist in clean up, verify an incident, etc. This may also involve coordination with maintenance centers.
  6. The center shall receive inputs concerning upcoming events that would effect the traffic network from event promoters, traveler information service providers, media, border crossings, and rail operations centers.
  7. The center shall provide road network conditions and traffic images to emergency management centers, maintenance and construction centers, and traveler information service providers.
  8. The center shall monitor incident response performance and calculate incident response and clearance times.
  9. The center shall exchange road network status assessment information with emergency management and maintenance centers including an assessment of damage sustained by the road network including location and extent of the damage, estimate of remaining capacity, required closures, alternate routes, necessary restrictions, and time frame for repair and recovery.
  10. The center shall coordinate information and controls with other traffic management centers.
  11. The center shall receive inputs from emergency management and transit management centers to develop an overall status of the transportation system including emergency transit schedules in effect and current status and condition of the transportation infrastructure.
  12. The center shall support an interface with a map update provider, or other appropriate data sources, through which updates of digitized map data can be obtained and used as a background for traffic incident management.
  13. The center shall respond to requests from border agencies to implement special traffic control measures (e.g. lane assignments by vehicle type) on the approaches to a border crossing.
Functional Area: TMC Multimodal Coordination
  1. The center shall respond to requests from transit management centers for signal priority at one or more intersections along a particular transit route.
  2. The center shall exchange information with transit management centers including details current transit routes, the level of service on each route, and the progress of individual vehicles along their routes.
Functional Area: TMC Regional Traffic Management
  1. The center shall exchange traffic information with other traffic management centers including incident information, congestion data, traffic data, signal timing plans, and real-time signal control information.
  2. The center shall exchange traffic control information with other traffic management centers to support remote monitoring and control of traffic management devices (e.g. signs, sensors, signals, cameras, etc.).
Functional Area: TMC Environmental Monitoring
  1. The center shall remotely control environmental sensors that measure road surface temperature, moisture, icing, salinity, and other measures.
  2. The center shall remotely control environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
  3. The center shall assimilate current and forecast road conditions and surface weather information using a combination of weather service provider information (such as the National Weather Service and value-added sector specific meteorological services), data from roadway maintenance operations, and environmental data collected from sensors deployed on and about the roadway.
  4. The center shall provide weather and road condition information to weather service providers and center personnel.
  5. The center shall respond to control data from center personnel regarding environmental sensor control and weather data collection and processing.
Functional Area: TMC Signal Control
  1. The center shall remotely control traffic signal controllers.
  2. The center shall accept notifications of pedestrian calls.
  3. The center shall collect traffic signal controller operational status and compare against the control information sent by the center.
  4. The center shall collect traffic signal controller fault data from the field.
  5. The center shall manage (define, store and modify) control plans to coordinate signalized intersections, to be engaged at the direction of center personnel or according to a daily schedule.
  6. The center shall implement control plans to coordinate signalized intersections based on data from sensors.
  7. The center shall manage boundaries of the control sections used within the signal system.
  8. The center shall maintain traffic signal coordination including synchronizing clocks throughout the system.
Functional Area: TMC Traffic Information Dissemination
  1. The center shall remotely control dynamic messages signs for dissemination of traffic and other information to drivers.
  2. The center shall remotely control driver information systems that communicate directly from a center to the vehicle radio (such as Highway Advisory Radios) for dissemination of traffic and other information to drivers.
  3. The center shall collect operational status for the driver information systems equipment (DMS, HAR, etc.).
  4. The center shall collect fault data for the driver information systems equipment (DMS, HAR, etc.) for repair.
  5. The center shall retrieve locally stored traffic information, including current and forecasted traffic information, road and weather conditions, traffic incident information, information on diversions and alternate routes, closures, and special traffic restrictions (lane/shoulder use, weight restrictions, width restrictions, HOV requirements), and the definition of the road network itself.
  6. The center shall distribute traffic data to maintenance and construction centers, transit centers, emergency management centers, and traveler information providers.
  7. The center shall distribute traffic data to the media; the capability to provide the information in both data stream and graphical display shall be supported.
  8. The center shall provide the capability for center personnel to control the nature of the data that is available to non-traffic operations centers and the media.
Functional Area: Traffic Equipment Maintenance
  1. The center shall collect and store sensor (traffic, pedestrian, multimodal crossing) operational status.
  2. The center shall collect and store CCTV surveillance system (traffic, pedestrian) operational status.
  3. The center shall collect and store sensor (traffic, pedestrian, multimodal crossing) fault data and send to the maintenance center for repair.
  4. The center shall collect and store CCTV surveillance system (traffic, pedestrian) fault data send to the maintenance center for repair.
  5. The center shall collect environmental sensor operational status.
  6. The center shall collect environmental sensor equipment fault data and send to the maintenance center for repair.
  7. The center shall exchange data with maintenance centers concerning the reporting of faulty equipment and the schedule/status of their repair. Information exchanged includes details of new equipment faults, and clearances when the faults are cleared.
  8. The center shall support an interface with a map update provider, or other appropriate data sources, through which updates of digitized map data can be obtained and used as a background for traffic maintenance data.
Functional Area: Traffic Data Collection
  1. The center shall collect traffic management data such as operational data, event logs, etc.
  2. The center shall assign quality control metrics and meta-data to be stored along with the data. Meta-data may include attributes that describe the source and quality of the data and the conditions surrounding the collection of the data.
  3. The center shall receive and respond to requests from ITS Archives for either a catalog of the traffic data or for the data itself.
  4. The center shall be able to produce sample products of the data available.
Functional Area: TMC Speed Monitoring and Warning
  1. The center shall remotely control vehicle speed sensors typically placed in work zones; control parameters may include environmental and traffic conditions.
  2. The center shall collect operational status for the vehicle speed sensors; the status shall include logged information including measured speeds, warning messages displayed, and violation records.
  3. The center shall provide the capability to notify an enforcement agency when vehicle speeds in the work zone are in excess of the posted speed limit or are creating an unsafe condition based upon the current environmental or traffic conditions.
  4. The center shall collect fault data for the vehicle speed sensors for repair.
Functional Area: TMC Work Zone Traffic Management
  1. The center shall receive work zone images from a maintenance center.
  2. The center shall analyze work zone images for indications of a possible incident.
  3. The center shall remotely control driver information systems (such as dynamic messages signs, highway advisory radios) to advise drivers of activity around a work zone.
  4. The center shall collect operational status for the driver information systems equipment in work zones.
  5. The center shall collect fault data for the driver information systems equipment in work zones for repair.
  6. The center shall receive proposed maintenance and construction work plans, analyze the activity as a possible incident, and provide work plan feedback to the sending center.
Functional Area: TMC Evacuation Support
  1. The center shall coordinate planning for evacuation with emergency management centers - including pre-planning activities such as establishing routes, areas to be evacuated, timing, etc.
  2. The center shall support requests from emergency management centers to preempt the current traffic control strategy, activate traffic control and closure systems such as gates and barriers, activate safeguard systems, or use driver information systems to support evacuation traffic control plans.
  3. The center shall coordinate information and controls with other traffic management centers.
  4. The center shall coordinate execution of evacuation strategies with emergency management centers - including activities such as setting closures and detours, establishing routes, updating areas to be evacuated, timing the process, etc.