AVSS03-Longitudinal Safety Warning (Service Package*)

Description

This service package allows for longitudinal warning. It utilizes safety sensors and collision sensors. It requires on-board sensors to monitor the areas in front of and behind the vehicle and present warnings to the driver about potential hazards.

Service Package Graphic

Vehicle Longitudinal Warning SystemVehicle Location DeterminationBasic VehicleDriverLocation Data SourceMap Update ProviderVehiclePotential ObstaclesRoadway Environmentdriver updatesbasic vehicle measuresdriver inputsposition fixmap updatesmap update requestphysical presenceroadway characteristics

Get the Source Graphic, a Windows Metafile (WMF), in ZIP format.
About this Graphic

Includes Equipment Packages and Subsystems:

Includes Architecture Flows:

Source Architecture Flow Destination In Graphic
Basic Vehicle basic vehicle measures Vehicle Yes
Driver driver inputs Vehicle Yes
Location Data Source position fix Vehicle Yes
Map Update Provider map updates Vehicle Yes
Potential Obstacles physical presence Vehicle Yes
Roadway Environment roadway characteristics Vehicle Yes
Vehicle driver updates Driver Yes
Vehicle map update request Map Update Provider Yes
    - This icon indicates that the associated architecture flow either has been or will be addressed by ITS Standards. Select the architecture flow for more information on relevant standards activities.

Associated Planning Factors and Goals

Planning Factor Goal
B. Increase the safety of the transportation system for motorized and nonmotorized users; Improve the safety of the transportation system

Associated Objective Categories

Objective Category
Safety: Vehicle Crashes and Fatalities

Associated Objectives and Performance Measures

Objective Performance Measure
Reduce crashes at intersections Number of crashes and fatalities at signalized intersections
Reduce crashes at intersections Number of crashes and fatalities at unsignalized intersections
Reduce crashes at intersections Number of crashes and fatalities related to red-light running
Reduce crashes due to driver errors and limitations Number of crashes and fatalities related to driver inattention and distraction
Reduce crashes due to driver errors and limitations Number of crashes and fatalities related to driving while intoxicated
Reduce crashes due to road weather conditions Number of crashes and fatalities related to weather conditions
Reduce crashes due to unexpected congestion Number of crashes and fatalities related to unexpected congestion
Reduce crashes due to unsafe drivers, vehicles and cargo on the transportation system Number of crashes and fatalities due to commercial vehicle safety violations
Reduce secondary crashes Number of secondary crashes
Reduce speed differential Number of crashes and fatalities related to excessive speeding
Reduce speed differential Number of speed violations
Reduce the total number of crashes in the region by X percent by year Y. Total crashes per X VMT.
Reduce the total number of crashes involving bicyclists and pedestrians in the region by X percent by year Y. Total crashes involving bicycles.
Reduce the total number of crashes involving bicyclists and pedestrians in the region by X percent by year Y. Total crashes involving pedestrians.
Reduce the total number of fatalities and severe injuries in the region by X percent by year Y. Total fatalities per X VMT.
Reduce the total number of fatalities and severe injuries in the region by X percent by year Y. Total severe injuries per X VMT.

 
Since the mapping between objectives and service packages is not always straight-forward and often situation-dependent, these mappings should only be used as a starting point. Users should do their own analysis to identify the best service packages for their region.

Related ITS Applications of ITS Taxonomy

Classification Category ITS Application Area ITS Application(s)
Intelligent Vehicles Collision Avoidance Forward Collision Warning
Intelligent Vehicles Collision Avoidance Obstacle Detection
Intelligent Vehicles Driver Assistance Object Detection

User Services related to this Service Package:

User Service
6.1 Longitudinal Collision Avoidance
6.5 Safety Readiness

Transaction Set Diagram





The source graphic, a Windows Metafile (WMF), for the TSD can be downloaded here: TSD

The following discusses how the National ITS Architecture provides the transportation service described by this service package. Each numbered item describes the operation of that portion of the service package identified with the corresponding number on the transaction set diagram.

  1. The vehicle receives input from the Driver (e.g. throttle and brake) (driver inputs). Data is also collected from sensors on the vehicle (basic vehicle measures) associated with basic vehicle systems (e.g. traction control, anti-lock brakes, speedometer, accelerometer, and basic engine measurements) and sensors detect objects that may be in front of or behind the vehicle (physical presence) as well as sensing the roadway environment (roadway characteristics). The Vehicle subsystem analyzes this data and presents updates and alarms to the Driver regarding potential collision with objects, people or vehicles ahead of or behind the vehicle (driver updates).

  2. Accurate positioning of the vehicle on the road network can also be used to improve performance of the vehicle safety system. Accurate position combined with detailed map data provides information about the road geometry ahead of the vehicle which can be used to adjust alarm thresholds and reduce false alarms. A position fix provides vehicle location and current accurate map data is provided to the vehicle (map update request and map updates).