District of Columbia ITS Architecture

Interfaces:

Collect Traffic Surveillance

• The center shall monitor, analyze, and store traffic sensor data (speed, volume, occupancy) collected from field elements under remote control of the center.
• The center shall monitor, analyze, and distribute traffic images from CCTV systems under remote control of the center.
• The center shall monitor, analyze, and store multimodal crossing and high occupancy vehicle (HOV) lane sensor data under remote control of the center.
• The center shall distribute road network conditions data (raw or processed) based on collected and analyzed traffic sensor and surveillance data to other centers.
• The center shall respond to control data from center personnel regarding sensor and surveillance data collection, analysis, storage, and distribution.
• The center shall maintain a database of surveillance and sensors and the freeways, surface street and rural roadways, e.g. where they are located, to which part(s) of the network their data applies, the type of data, and the ownership of each link (that is, the agency or entity responsible for collecting and storing surveillance of the link) in the network.
• 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.

ITS Data Repository

• The center shall collect data to be archived from one or more data sources.
• The center shall collect data catalogs from one or more data sources. A catalog describes the data contained in the collection of archived data and may include descriptions of the schema or structure of the data, a description of the contents of the data; e.g., time range of entries, number of entries; or a sample of the data (e. g. a thumbnail).
• The center shall store the archived data in a focused repository that is suited to a particular set of ITS data users.
• The center shall include capabilities for performing quality checks on the incoming archived data.
• The center shall include capabilities for error notification on the incoming archived data.
• The center shall include capabilities for archive to archive coordination.
• The center shall support a broad range of archived data management implementations, ranging from simple data marts that collect a focused set of data and serve a particular user community to large-scale data warehouses that collect, integrate, and summarize transportation data from multiple sources and serve a broad array of users within a region.
• The center shall perform quality checks on received data.
• The center shall provide the capability to execute methods on the incoming data such as cleansing, summarizations, aggregations, or transformations applied to the data before it is stored in the archive.
• The center shall respond to requests from the administrator interface function to maintain the archive data.
• When data or a catalog of data is received from the archive, the center shall generate the requested data product for the users systems.

Emergency Response Management

• The center shall provide strategic emergency response capabilities provided by an Emergency Operations Center for large-scale incidents and disasters.
• The center shall manage coordinated inter-agency responses to and recovery from large-scale emergencies. Such agencies include traffic management, transit, maintenance and construction management, rail operations, and other emergency management agencies.
• The center shall provide the capability to implement response plans and track progress through the incident by exchanging incident information and response status with allied agencies.
• The center shall develop, coordinate with other agencies, and store emergency response plans.
• The center shall track the availability of resources and coordinate resource sharing with allied agency centers including traffic, maintenance, or other emergency centers.
• The center shall allocate the appropriate emergency services, resources, and vehicle (s) to respond to incidents, and shall provide the capability to override the current allocation to suit the special needs of a current incident.
• The center shall receive event scheduling information from Event Promoters.
• The center shall support remote control of field equipment normally under control of the traffic management center including traffic signals, dynamic message signs, gates, and barriers.
• The center shall provide the capability to remotely control and monitor CCTV systems normally operated by a traffic management center.
• The center shall provide the capability to request transit resource availability from transit centers for use during disaster and evacuation operations.
• The center shall assimilate the damage assessment of the transit, traffic, rail, maintenance, and other emergency center services and systems to create an overall transportation system status, and disseminate to each of these centers and the traveling public via traveler information providers.
• The center shall provide information to the media concerning the status of an emergency response.
• The center shall provide the capability for digitized map data to act as the background to the information presented to the emergency system operator.
• The center shall provide the capability for center personnel to provide inputs to the management of incidents, disasters and evacuations.
• The center shall collect information about the status of the recovery efforts for the infrastructure during disasters.
• The center shall provide the overall status of infrastructure recovery efforts to traveler information providers and media.
• The center shall provide the capability to communicate information about emergency situations to local population through the Emergency Telecommunications System.
• The center shall provide the capability to identify neighborhoods and businesses that should be informed of an emergency situation based on information collected about incidents including their severity, impacted locations, and recovery schedule.

HRI Traffic Management

• The center shall remotely control highway-rail intersection (HRI) equipment located in the field.
• The center shall accept collect highway-rail intersection (HRI) advisory or alert data from rail operations centers.
• The center shall collect highway-rail intersection (HRI) equipment operational status and compare against the control information sent by the center.
• The center shall provide the highway-rail intersection (HRI) equipment operational status to rail operations centers.
• The center shall collect incident information related to a highway-rail intersection (HRI), such as intersection blockages or crashes or equipment malfunctions.
• 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.

Parking Management

• The parking element shall maintain parking space information including static information such as hours of operation, rates, location, capacity, type, and constraints; as well as dynamic information such as current availability.
• The parking element shall share information with a traffic management center to identify parking space availability along a street or at a location, and other information that supports coordinated local traffic control in and around the parking location(s).
• The parking element shall manage local dynamic message signs that display messages to travelers such as number of parking spaces available, location of parking spaces available, and current charges.

Rail Operations Coordination

TMC Freeway Management

• The center shall remotely control systems to manage use of the freeways, including ramp meters, mainline metering, and lane controls.
• The center shall collect operational status from ramp meters, mainline metering, and lane controls and compare against the control information sent by the center.
• The center shall collect fault data from ramp meters, mainline metering, and lane controls.
• The center shall implement control strategies, under control of center personnel, on some or all of the freeway network devices (e.g. ramp meters, mainline metering, and lane controls), based on data from sensors monitoring traffic conditions upstream, downstream, and queue data on the ramps themselves.

TMC HOV Lane Management

TMC Incident Detection

• 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.
• The center shall collect and store traffic flow and image data from the field equipment to detect and verify incidents.
• The center shall receive inputs concerning upcoming events that would effect the traffic network from event promoters, traveler information service providers, border crossings, and intermodal freight depots.
• 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.
• The center shall support requests from emergency management centers and border inspection systems to remotely control sensor and surveillance equipment located in the field.
• The center shall provide road network conditions and traffic images to emergency management centers to support the detection, verification, and classification of incidents.
• The center shall provide video and traffic sensor control commands to the field equipment to detect and verify incidents.
• The center shall receive inputs concerning upcoming events that would effect the traffic network from event promoters.

TMC Incident Dispatch Coordination/Communication

• 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.
• The center shall coordinate planning for incidents with emergency management centers - including pre-planning activities for disaster response, evacuation, and recovery operations.
• 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.
• 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.
• 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.
• 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.
• The center shall provide road network conditions and traffic images to emergency management centers, maintenance and construction centers, and traveler information service providers.
• The center shall monitor incident response performance and calculate incident response and clearance times.
• 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.
• The center shall coordinate information and controls with other traffic management centers.
• 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.
• 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.
• 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.

TMC Multimodal Coordination

• The center shall respond to requests from transit management centers for signal priority at one or more intersections along a particular transit route.
• 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.

TMC Probe Information Collection

• The center shall collect traffic probe data from vehicles via roadside field equipment.
• The center shall collect road condition data from probe-equipped transit vehicles via transit management centers; the data may be aggregated and preliminarily processed at the sending center.
• The center shall collect traffic data from traveler information centers based on data from their subscriber vehicles; the data may be aggregated and initial link time calculations performed at the sending center.
• The center shall assimilate current and forecast traffic conditions based on collected probe data and distribute to other centers for dissemination to travelers.
• The center shall collect operational status for the roadside probe data collection equipment.
• The center shall collect fault data for the roadside probe data collection equipment for repair.

TMC Regional Traffic Management

• 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.
• 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.).
• The center shall exchange video (CCTV images) with other centers, including the capability to allow other centers to pan, tilt, and zoom its CCTV cameras.

TMC Reversible Lane Management

• The center shall remotely control devices to detect traffic in reversible lanes, including wrong-way vehicles.
• The center shall monitor the use of reversible lanes and detect wrong-way vehicles in reversible lanes using sensor and surveillance information, and the current lane control status (which direction the lane is currently operating).
• The center shall remotely control automated reversible lane equipment and driver information systems (such as lane control signals) that control traffic in reversible lanes on surface streets.
• The center shall remotely control automated reversible lane equipment and driver information systems (such as lane control signals) that control traffic in reversible lanes on freeways.
• The center shall collect operational status for the reversible lane field equipment.
• The center shall collect fault data for the reversible lane field equipment and send to the maintenance center for repair.
• The center shall provide the capability for center personnel to control access and management of reversible lane facilities, including the direction of traffic flow changes during the day, especially between the peak hours and dedication of more lanes to the congestion direction during special events.

TMC Environmental Monitoring

• The center shall remotely control environmental sensors that measure road surface temperature, moisture, icing, salinity, and other measures.
• The center shall remotely control environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
• 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.
• The center shall provide weather and road condition information to weather service providers and center personnel.
• The center shall respond to control data from center personnel regarding environmental sensor control and weather data collection and processing.

TMC Signal Control

• The center shall remotely control traffic signal controllers.
• The center shall accept notifications of right-of-way requests from pedestrians.
• The center shall collect traffic signal controller operational status and compare against the control information sent by the center.
• The center shall collect traffic signal controller fault data from the field.
• The center shall implement control plans to coordinate signalized intersections, under control of center personnel, based on data from sensors and surveillance monitoring traffic conditions, incidents, emergency vehicle preemptions, the passage of commercial vehicles with unusual loads, equipment faults, pedestrian crossings, etc.

TMC Demand Management Coordination

TMC Traffic Information Dissemination

• The center shall remotely control dynamic messages signs for dissemination of traffic and other information to drivers.
• 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.
• The center shall collect operational status for the driver information systems equipment (DMS, HAR, etc.).
• The center shall collect fault data for the driver information systems equipment (DMS, HAR, etc.) for repair.
• 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.
• The center shall distribute traffic data to maintenance and construction centers, transit centers, emergency management centers, and traveler information providers.
• 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.
• 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.

Traffic Maintenance

• The center shall collect and store sensor (traffic, pedestrian, multimodal crossing) operational status.
• The center shall collect and store CCTV surveillance system (traffic, pedestrian) operational status.
• The center shall collect and store sensor (traffic, pedestrian, multimodal crossing) fault data and send to the maintenance center for repair.
• The center shall collect and store CCTV surveillance system (traffic, pedestrian) fault data send to the maintenance center for repair.
• The center shall collect environmental sensor operational status.
• The center shall collect environmental sensor equipment fault data and send to the maintenance center for repair.
• 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.
• 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.

Government Reporting Systems Support

• The center shall provide data from an ITS archive to federal, state, or local government reporting systems.
• The center shall provide the capability to select data from an ITS archive for use in government reports.
• The center shall provide the capability to format data from an ITS archive suitable for input into government reports.
• The center shall support requests for ITS archived data from Government Reporting Systems.
• The center shall provide the applicable meta-data for any ITS archived data to satisfy government reporting system requests. Meta-data may include attributes that describe the source and quality of the data and the conditions surrounding the collection of the data.

On-Line Analysis and Mining

• The center shall support the interface with Archive Data User Systems for requests for analysis of the archive data.
• The center shall provide the capability to perform activities such as data mining, data fusion, summarizations, aggregations, and recreation from archive data. This may include multidimensional analysis, selective summarization and expansion of data details, and many other advanced analysis services.
• The center shall receive the user’s systems requests and develop the request to retrieve the data from the archive.
• The center shall respond to users systems requests for a catalog of the archived data analysis products available.
• For archive analysis and data mining products requiring financial payment the center shall process the financial requests and manage an interface to a Financial Institution.

ISP Data Collection

• The center shall collect traveler information data, such as parking lot data, rideshare data, road network use data, vehicle probe data, and other data from traveler information system operations.
• The center shall collect traveler requests, confirmations, and payment transaction data for traveler services provided.
• 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.
• The center shall receive and respond to requests from ITS Archives for either a catalog of the traveler information data or for the data itself.
• The center shall be able to produce sample products of the data available.

Traffic Data Collection

• The center shall collect traffic management data such as operational data, event logs, etc.
• 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.
• The center shall receive and respond to requests from ITS Archives for either a catalog of the traffic data or for the data itself.
• The center shall be able to produce sample products of the data available.

Emergency Data Collection

• The center shall collect emergency service data, emergency vehicle management data, emergency vehicle data, sensor and surveillance data, threat data, and incident data.
• 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.
• The center shall receive and respond to requests from ITS Archives for either a catalog of the emergency management data or for the data itself.
• The center shall be able to produce sample products of the data available.

Parking Data Collection

• The parking element shall collect parking management data including lot usage and charging information.
• The parking element 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.
• The parking element shall receive and respond to requests from ITS Archives for either a catalog of the parking management data or for the data itself.
• The parking element shall be able to produce sample products of the data available.

Traffic and Roadside Data Archival

• The center shall manage the collection of archive data directly from collection equipment located at the roadside.
• The center shall collect traffic sensor information from roadside devices.
• The center shall respond to requests from the Archive Data Administer to input the parameters that control the collection process.
• The center shall send the request for data and control parameters to the field equipment where the information is collected and returned.
• The center shall record the status about the imported traffic and roadside data.
• The center shall use the status information to adjust the collection of traffic and roadside data.

Parking Electronic Payment

Parking Coordination

• The parking element shall exchange parking management data with other parking facilities including location, hours, availability, status, lot usage, operating strategies, and charging information.
• The parking element shall distribute parking lot information upon request to traveler information providers to support travel planning.

MCM Maintenance Decision Support

MCM Environmental Information Processing

MCM Data Collection

• The center shall collect maintenance and construction data (such as field equipment status, infrastructure status, maintenance and construction activity data) gathered from roadway, traffic, and other maintenance and construction sources.
• 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.
• The center shall receive and respond to requests from ITS Archives for either a catalog of the maintenance and construction data or for the data itself.
• The center shall be able to produce sample products of the data available.
• The center shall provide data to Asset Management to be used in updating the status of assets in the inventory.

MCM Environmental Information Collection

• The center shall remotely control environmental sensors that measure road surface temperature, moisture, icing, salinity, and other measures.
• The center shall remotely control environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
• The center shall remotely control environmental sensors on-board maintenance and construction vehicles that measure road and weather conditions including air and surface temperatures, wind speed, humidity, precipitation, visibility and other measures.
• The center shall collect environmental probe data (air temperature, exterior light status, wiper status, traction control status, etc.) from short range communications equipment that communicates with appropriately equipped probe vehicles.
• 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 traffic and traveler information providers, and environmental data collected from sensors deployed on and about the roadway as well as the fleet of maintenance and construction vehicles and the broader population of vehicle probes.
• The center shall provide weather and road condition information to weather service providers and center personnel.
• The center shall respond to control data from center personnel regarding environmental sensor control and weather data collection and processing.
• The center shall collect operational status for the roadside and vehicle-based environmental sensor equipment.
• The center shall collect fault data for the roadside and vehicle-based environmental sensor equipment for repair.

MCM Roadway Maintenance and Construction

MCM Work Activity Coordination

MCM Work Zone Management

Service Patrol Management

• The center shall dispatch roadway service patrol vehicles to identified incident locations.
• The center shall store the current status of all service patrol vehicles available for dispatch and those that have been dispatched.
• The center shall share incident information collected by the service patrol with traffic, maintenance and construction, and traveler information centers for incident management, incident notification to travelers, and incident cleanup.
• The center shall track the location and status of service patrol vehicles.

TMC Speed Monitoring

TMC Work Zone Traffic Management

• The center shall receive work zone images from a maintenance center.
• The center shall analyze work zone images for indications of a possible incident.
• 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.
• The center shall collect operational status for the driver information systems equipment in work zones.
• The center shall collect fault data for the driver information systems equipment in work zones for repair.
• 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.

TMC Multimodal Crossing Management

Incident Command

• The center shall provide tactical decision support, resource coordination, and communications integration for Incident Commands that are established by first responders to support local management of an incident.
• The center shall provide incident command communications with public safety, emergency management, transportation, and other allied response agency centers.
• The center shall track and maintain resource information and action plans pertaining to the incident command.
• The center shall share incident command information with other public safety agencies including resource deployment status, hazardous material information, rail incident information, evacuation advice as well as traffic, road, and weather conditions.
• The center shall assess the status of responding emergency vehicles as part of an incident command.

TMC Evacuation Support

• 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.
• 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.
• The center shall coordinate information and controls with other traffic management centers.
• 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.