Architecture Flow Definitions

(Source: National ITS Architecture)

Below are the architecture flow definitions from the National ITS Architecture exclusive to the Regional ITS Architecture:

accident report: Report of commercial vehicle safety accident.  The information may be provided as a response to a real-time query or proactively by the source.  The query flow is not explicitly shown.

archive analysis requests: A user request that initiates data mining, analytical processing, aggregation or summarization, report formulation, or other advanced processing and analysis of archived data.

archive analysis results: Processed information products, supporting meta data, and any associated transaction information resulting from data mining, analytical processing, aggregation or summarization, report formulation, or other on-line processing and analysis of archived data.

archive coordination: Catalog data, meta data, published data, and other information exchanged between archives to support data synchronization and satisfy user data requests.

archive requests: A request to a data source for information on available data (i.e. "catalog") or a request that defines the data to be archived. The request can be a general subscription intended to initiate a continuous or regular data stream or a specific request.

archive status: Notification that data provided to an archive contains erroneous, missing, or suspicious data or verification that the data provided appears valid.  If an error has been detected, the offending data and the nature of the potential problem are identified.

audit data: Information to support a tax audit.

broadcast information: General broadcast information that contains link travel times, incidents, advisories, transit services and a myriad of other traveler information.

Citation: Report of commercial vehicle citation.  The citation includes references to the statute(s) that was (were) violated.  It includes information on the violator and the officer issuing the citation.

commercial vehicle archive data: Information describing commercial vehicle travel and commodity flow characteristics.  Content may include a catalog of available information, the actual information to be archived, and associated meta data that describes the archived information.

compliance review report: Report containing results of carrier compliance review, including concomitant out-of-service notifications, carrier warnings/notifications.  The information may be provided as a response to a real-time query of proactively by the source.

credential application: Application for commercial vehicle credentials.  Authorization for payment is included.

credentials information: Response containing full credentials information.  "Response" may be provided in reaction to a real-time query or a standing request for updated information.  The query flow is not explicitly shown.

credentials status information: Credentials information such as registration, licensing, insurance, check flags, and electronic screening enrollment data.  A unique identifier is included.  Corresponds to the credentials portion of CVISN "snapshots."

current asset restrictions: Restrictions levied on transportation asset usage based on infrastructure design, surveys, tests, or analyses.  This includes standard facility design height, width, and weight restrictions, special restrictions such as spring weight restrictions.

daily site activity data: Record of daily activities at commercial vehicle check stations including summaries of screening events and inspections.

data collection and monitoring control: Information used to configure and control data collection and monitoring systems.

demand responsive transit plan: Plan regarding overall demand responsive transit schedules and deployment.

demand responsive transit request: Request for paratransit support.

driver instructions: Transit service instructions, traffic information, road conditions, and other information for both transit and paratransit drivers.

driver to fleet request: Requests from the driver and vehicle for routing, payment, and enrollment information.

emergency acknowledge: Acknowledge request for emergency assistance and provide additional details regarding actions and verification requirements.

emergency dispatch requests: Emergency vehicle dispatch instructions including incident location and available information concerning the incident.

emergency dispatch response: Request for additional emergency dispatch information (e.g., a suggested route) and provision of en route status.

emergency notification: An emergency request for assistance originated by a traveler using an in-vehicle, public access, or personal device.

emergency traffic control request: Special request to preempt the current traffic control strategy in effect at one or more signalized intersections or highway segments.  For example, this flow can request all signals to red-flash, request a progression of traffic control preemptions.

emergency traffic control response: Status of the special traffic signal control strategy implemented in response to the emergency traffic control request.

emergency vehicle tracking data: The current location and operating status of the emergency vehicle.

environmental conditions data: Current road conditions (e.g., surface temperature, subsurface temperature, moisture, icing, treatment status) and surface weather conditions (e.g., air temperature, wind speed, precipitation, visibility) as measured and reported by environmental sensors.

environmental sensors control: Data used to configure and control environmental sensors.

equipment maintenance status: Current status of field equipment maintenance actions.

external reports: Traffic and incident information that is collected by the media through a variety of mechanisms (e.g., radio station call-in programs, air surveillance).

fare and payment status: Current fare collection information including the operational status of the fare collection equipment and financial payment transaction data.

fare management information: Transit fare information and transaction data used to manage transit fare processing on the transit vehicle.

field device status: Reports from field equipment (sensors, signals, signs, controllers, etc.) which indicate current operational status.

fleet to driver update: Updated instructions to the driver including dispatch, routing, and special instructions.

freeway control data: Control commands and operating parameters for ramp meters, mainline metering/lane controls and other systems associated with freeway operations.

freeway control status: Current operational status and operating parameters for ramp meters, mainline metering/lane controls and other control equipment associated with freeway operations.

hazmat information: Information about a particular hazmat load including nature of the load and unloading instructions. May also include hazmat vehicle route and route update information.

hazmat information request: Request for information about a particular hazmat load.

high threat facility incident information: Threats regarding transportation infrastructure, facilities, or systems detected by a variety of methods (sensors, surveillance, threat analysis of advisories from outside agencies, etc.

incident command information: Information that supports local management of an incident.  It includes resource deployment status, hazardous material information, traffic, road, and weather conditions, evacuation advice, and other information.

incident command request: Request for resources, commands for relay to other allied response agencies, and other requests that reflect local command of an evolving incident response.

incident information: Notification of existence of incident and expected severity, location, time and nature of incident.

incident information for media: Report of current desensitized incident information prepared for public dissemination through the media.

incident information request: Request for incident information, clearing time, severity.  The request can be a subscription that initiates as-needed information updates as well as a one-time request for information.

incident notification: The notification of an incident including its nature, severity, and location.

incident notification response: Interactive acknowledgement and verification of the incident information received, requests for additional information, and general information on incident response status.

incident report: Report of an identified incident including incident location, type, severity and other information necessary to initiate an appropriate incident response.

incident response coordination: Incident response procedures, resource coordination, and current incident response status that are shared between allied response agencies to support a coordinated response to incidents.

incident response status: Status of the current incident response including traffic management strategies implemented at the site (e.g., closures, diversions, traffic signal control overrides).

incident status information: gathered at the incident site that more completely characterizes the incident and provides current incident response status.

infrastructure monitoring sensor control: Data used to configure and control infrastructure monitoring sensors.

infrastructure monitoring sensor data: Data read from infrastructure-based sensors that monitor the condition of pavement, bridges, culverts, signs, and other roadway infrastructure.

ISP coordination: Coordination and exchange of transportation information between centers.  This flow allows a broad range of transportation information collected by one ISP to be redistributed to many other ISPs and their clients.

local signal preemption request: Direct control signal or message to a signalized intersection that results in preemption of the current control plan and grants right-of-way to the requesting vehicle.

local signal priority request: Request from a vehicle to a signalized intersection for priority at that intersection.

maint and constr dispatch information: Information used to dispatch maintenance and construction vehicles, equipment, and crews.  This information includes routing information, traffic information, road restrictions, incident information, environmental information, decision support information.

maint and constr dispatch status: Current maintenance and construction status including work data, operator status, crew status, and equipment status.

maint and constr resource coordination: Request for road maintenance and construction resources that can be used in the diversion of traffic (cones, portable signs), clearance of a road hazard,  repair of ancillary damage, or any other incident response.

maint and constr resource request: Request for road maintenance and construction resources that can be used in the diversion of traffic (cones, portable signs), clearance of a road hazard,  repair of ancillary damage, or any other incident response.

maint and constr resource response: Current status of maintenance and construction resources including availability and deployment status.

maint and constr vehicle conditions: Vehicle diagnostics information that is collected, filtered, and selectively reported by a maintenance and construction vehicle.  The information includes engine temperature, mileage, tire wear, brake wear, belt wear, and any warnings or alarms.

maint and constr vehicle location data: The current location and related status (e.g., direction and speed) of the maintenance/construction vehicle.

maint and constr vehicle operational data: Data that describes the maintenance and construction activity performed by the vehicle. Operational data includes materials usage (amount stored and current application rate), operational state of the maintenance equipment (e.g., blade up/down, spreader.

maint and constr work plans: Future construction and maintenance work schedules and activities including anticipated closures with anticipated impact to the roadway, alternate routes, anticipated delays, closure times, and durations.

media information request: Request from the media for current transportation information.

on-board safety data: Safety data measured by on-board sensors.  Includes information about the vehicle, vehicle components, cargo, and driver.

on-board safety request: Request for on-board vehicle safety data by the roadside equipment.

on-board vehicle data: Information about the commercial vehicle stored on-board (for maintenance purposes, gate access, cargo status, lock status, etc.).

on-board vehicle request: Request for on-board vehicle data.

parking availability: Current parking lot occupancy, parking availability, and cost information.

parking coordination: Information that enables parking management activities to be coordinated between different parking operators or systems in a region.

parking demand management request: Request to change the demand for parking facility use through pricing or other mechanisms.

parking demand management response: Response to parking demand management change requests indicating level of compliance with request.

parking information: General parking information and current parking availability.

parking instructions: Information that allows local parking facilities to be managed to support regional traffic management objectives.

parking lot data request: Request for parking lot occupancy, fares, and availability.    The request can be a subscription that initiates as-needed information updates as well as a one-time request for information.

parking lot reservation confirmation: Confirmation for parking lot reservation.

parking reservations request: Reservation request for parking lot.

Payment: Payment of some kind (e.g., toll, parking, fare) by traveler which, in most cases, can be related to a credit account.

personal transit information: General and personalized transit information for a particular fixed route, flexible route, or paratransit system.

remote surveillance control: The control commands used to remotely operate another center's sensors or surveillance equipment so that roadside surveillance assets can be shared by more than one agency.

request for bad tag list: Request for list of bad vehicle tag IDs.

request for payment: Request to deduct cost of service from user's payment account.

request for road network conditions: Request for traffic information, road conditions, surface weather conditions, incident information, and other road network status.  The request specifies the region/route of interest, the desired effective time period, and other parameters.

request tag data: Request for tag information including credit identity, stored value card cash, etc.

resource deployment status: Status of traffic management center resource deployment identifying the resources available and their current deployment status.

resource request: A request for traffic management resources to implement special traffic control measures, assist in clean up, verify an incident, etc.

road network conditions: Current and forecasted traffic information, road and weather conditions, incident information, and other road network status.  Either raw data, processed data, or some combination of both may be provided by this architecture flow.

road weather information: Road conditions and weather information that are made available by road maintenance operations to other transportation system operators.

roadside archive data: A broad set of data derived from roadside sensors that includes current traffic conditions, environmental conditions, and any other data that can be directly collected by roadside sensors.

roadway equipment coordination: The direct flow of information between field equipment.  This includes transfer of information between sensors and driver information systems or control devices (traffic signals, ramp meters, etc.), direct coordination between adjacent control devices.

roadway information system data: Information used to initialize, configure, and control roadside systems that provide driver information (e.g., dynamic message signs, highway advisory radio, beacon systems).

roadway information system status: Current operating status of dynamic message signs, highway advisory radios, beacon systems, or  other configurable field equipment that provides dynamic information to the driver.

roadway maintenance status: Summary of maintenance fleet operations affecting the road network.  This includes the status of winter maintenance (snow plow schedule and current status).

roadway treatment system control: Control data for remotely located, automated devices, that affect the roadway surface (e.g. de-icing applications).

roadway treatment system status: Current operational status of automated roadway treatment devices (e.g., anti-icing systems).

route plan: Tailored route provided by ISP in response to a specific request.

route request: Request for a tailored route based on given constraints.

safety inspection record: Record containing results of commercial vehicle safety inspection.

safety inspection report: Report containing results of commercial vehicle safety inspection.  The information may be provided as a response to a real-time query or proactively by the source.  The query flow is not explicitly shown.

safety status information: Safety information such as safety ratings, inspection summaries, and violation summaries.  A unique identifier is included.  Corresponds to the safety portion of CVISN "snapshots."  The status information may be provided as a response to a real-time query.

screening event record: Results of CVO electronic screening activity.

secure area monitoring support: Commands that control surveillance equipment and security sensors that monitor secure public transportation areas.  Also includes information for general advisories and alerts intended for general dissemination in these same public areas.

secure area surveillance data: Data collected from surveillance systems used to monitor secure areas.  Includes video, audio, and other security sensor outputs.

selected routes: Routes selected based on route request criteria.

signal control data: Information used to configure and control traffic signal systems.

signal control status: Status of surface street signal controls.

speed monitoring information: System status including current operational state and logged information including measured speeds, warning messages displayed, and violation records.

suggested route: Suggested route for a dispatched emergency or maintenance vehicle that may reflect current network conditions and the additional routing options available to en route emergency or maintenance vehicles that are not available to the general public.

tag data: Unique tag ID and related vehicle information.

tax filing: Commercial vehicle tax filing data.  Authorization for payment is included.

threat information coordination: Sensor, surveillance, and threat data including raw and processed data that is collected by sensor and surveillance equipment located in secure areas.

toll instructions: Demand management toll pricing information based on current congestion.

toll transactions: Detailed list of transactions from a toll station.

traffic archive data: Information describing the use and vehicle composition on transportation facilities and the traffic control strategies employed.  Content may include a catalog of available information, the actual information to be archived, and associated meta data.

traffic control coordination: Information transfers that enable remote monitoring and control of traffic management devices.  This flow is intended to allow cooperative access to, and control of, field equipment during incidents and special events and during day-to-day operations.

traffic flow: Raw and/or processed traffic detector data which allows derivation of traffic flow variables (e.g., speed, volume, and density measures) and associated information (e.g., congestion, potential incidents).

traffic images:        High fidelity, real-time traffic images suitable for surveillance monitoring by the operator or for use in machine vision applications.  This flow includes the images and the operational status of the surveillance system.

traffic information coordination: Traffic information exchanged between TMC’s. Normally would include incidents, congestion data, traffic data, signal timing plans, and real-time signal control information.

traffic sensor control: Information used to configure and control traffic sensor systems.

transit and fare schedules: Specific transit and fare schedule information including schedule adherence.

transit archive data: Data used to describe and monitor transit demand, fares, operations, and system performance.  Content may include a catalog of available information, the actual information to be archived, and associated meta data that describes the archived information.

transit emergency coordination data: Data exchanged between centers dealing with a transit-related incident.

transit emergency data: Initial notification of transit emergency at a transit stop or on transit vehicles and further coordination as additional details become available and the response is coordinated.

transit fare payment requests: Information provided from the transit user location that supports fare payments and associated record-keeping.

transit fare payment responses: Information provided by transit management that supports a fare payment transaction.

transit incident information: Information on transit incidents that impact transit services for public dissemination.

transit information request: Request for transit operations information including schedule and fare information.  The request can be a subscription that initiates as-needed information updates as well as a one-time request for information.

transit information user request: Request for special transit routing, real-time schedule information, and availability information.

transit parking coordination: Request for coordinated fare payment and parking lot price data.

transit parking lot response: Response to transit occupancy inquiries and coordination with parking lots.

transit request confirmation: Confirmation of a request for transit information or service.

transit schedule information: Current and projected transit schedule adherence.

transit traveler information: Transit information prepared to support transit users and other travelers.  It contains transit schedules, real-time arrival information, fare schedules, and general transit service information.

transit vehicle conditions: Operating conditions of transit vehicle (e.g., mileage).

transit vehicle location data: Current transit vehicle location and related operational conditions data provided by a transit vehicle.

transit vehicle passenger and use data: Data collected on board the transit vehicle pertaining to availability and/or passenger count.

transit vehicle schedule performance: Estimated times of arrival and anticipated schedule deviations reported by a transit vehicle.

traveler archive data: Data associated with traveler information services including service requests, facility usage, rideshare, routing, and traveler payment transaction data.  Content may include a catalog of available information, the actual information to be archived.

traveler information: Traveler information comprised of traffic status, advisories, incidents, payment information and many other travel-related data updates and confirmations.

traveler information for media     : General traveler information regarding incidents, unusual traffic conditions, transit issues, or other advisory information that has been desensitized and provided to the media.

traveler profile: Information about a traveler including equipment capabilities, personal preferences and recurring trip characteristics.

traveler request: Request by a traveler to summon assistance, request information, make a reservation, or initiate any other traveler service.

trip confirmation: Acknowledgement by the driver/traveler of acceptance of a route.

trip identification number: The unique trip load number for a specific cross-border shipment.

trip log: Driver's daily log, vehicle location, mileage, and trip activity (includes screening, inspection and border clearance event data as well as fare payments).

trip log request: Request for trip log.

trip plan: A sequence of links and special instructions comprising of a trip plan indicating efficient routes for navigating the links.  Normally coordinated with traffic conditions, other incidents, preemption and prioritization plans.

trip request: Request by a driver/traveler for special routing.

TRMS coord: Coordination information between local/regional transit organizations including schedule, on-time information, incident information, and ridership.

video surveillance control: Information used to configure and control video surveillance systems.

violation notification: Notification to enforcement agency of a violation.  The violation notification flow describes the statute or regulation that was violated and how it was violated (e. g., overweight on specific axle by xxx pounds or which brake was out of adjustment.

work plan coordination: Coordination of work plan schedules and activities between maintenance and construction organizations or systems.  This information includes the work plan schedules and comments and suggested changes that are exchanged as work plans are coordinated.

work zone information: Summary of maintenance and construction work zone activities affecting the road network including the nature of the maintenance or construction activity, location, impact to the roadway, expected time(s) and duration of impact, anticipated delays.

work zone status: Current work zone status including current location (and future locations for moving work zones), impact to the roadway, required lane shifts, expected time(s) and duration of impact, anticipated delays, alternate routes, and suggested speed limits.

work zone warning device control: Data used to configure and control work zone safety monitoring and warning devices.

work zone warning status: Status of a work zone safety monitoring and warning devices.  This flow documents system activations and includes additional supporting information (e.g., an image) that allows verification of the alarm.