Interface: Vehicle - Data Distribution System
Architecture Flow Definitions
broadcast traveler information (Future)
General traveler information that contains traffic and road conditions, link travel times, incidents, advisories, restrictions, transit service information, weather information, parking information, and other related traveler information.
data provision (Planned) Applicable ITS Standards
Data provision provides the source material for a publish-subscribe or query-retrieval data distribution scheme. This is the 1 of the 1:N data distribution architecture. This flow is a super-flow; it does not define data elements but is inclusive of any flow implemented using publish-subscribe or query-retrieval methods.
data publication (Planned) Applicable ITS Standards
Data publication includes those dialogs necessary to satisfy the publication portion of a data distribution architecture. At its core, it provides data, organized by the sender as a one-to-many. This is a super-flow, meaning that it does not define data elements and is inclusive of any flow that is design to use publish-subscribe.
data query (Planned) Applicable ITS Standards
Data query includes those dialogs necessary to determine what data is available for and also submit a query for near-term response.
data query publication (Planned) Applicable ITS Standards
Data query publication includes those dialogs necessary to satisfy the retrieval portion of a query-response action using the data distribution architecture. This is a super-flow, meaning that it does not define data elements and is inclusive of any flow that is design to use query-retrieval.
data subscription (Planned) Applicable ITS Standards
Data subscription includes those dialogs necessary to determine what data is available for subscription/query, and also the dialogs necessary to create or modify data subscriptions/queries.
traveler request (Planned)
A request for traveler information including traffic, transit, toll, parking, road weather conditions, event, and passenger rail information. The request identifies the type of information, the area of interest, parameters that are used to prioritize or filter the returned information, and sorting preferences.
traveler sourced updates (Planned)
Traveler posts on traffic and road conditions, transit services, traveler services, shelter information and other real-time crowd-sourced data that may be shared with other travelers.
vehicle situation data (Planned)
This flow represents vehicle snapshots that may be provided by the vehicle to support traffic and environmental conditions monitoring. Snapshots are collected by the vehicle for specific events (e.g., when a sensor exceeds a threshold) or periodically and reported based on control parameters when communications is available. Traffic-related data includes snapshots of measured speed and heading and events including starts and stops, speed changes, and other vehicle control events. Environmental data may include measured air temperature, exterior light status, wiper status, sun sensor status, rain sensor status, traction control status, anti-lock brake status, and other collected vehicle system status and sensor information. The collected data is reported along with the location, heading, and time that the data was collected.
vehicle situation data parameters (Future)
A request for vehicle situation data that includes parameters used to control the data that is reported and the flow of data reported by the vehicle. This flow identifies the type of data/snapshots that are requested and reporting parameters such as snapshot frequency, filtering criteria (data thresholds for reporting), and reporting interval.