Low Level Function
5.15.1.1 Detect Other Vehicles near to Host Vehicle

Overview

This Function shall be capable of providing the following facilities:

(1) The ability to take responsibility for processing information from sensors that detect the presence of Other Vehicles near to the Host Vehicle, i.e. the Vehicle in which it is operating.
(2) The ability to process the sensor data to determine if any Vehicles are present, their location relative to the Host Vehicle and to determine their types and probably trajectories.
(3) Once processing is complete, the ability to send the data in digital form to the Determine and store local Host Vehicle Conditions Function.

Functional Requirements

(a) continuously monitor the flow of input data
(b) convert the data in (a) into a digital form to show the location of other vehicles relative to the host vehicle, plus their type (e.g. private car, PT, HGV, HGV with hazardous goods, Emergency), direction of travel (trajectory) and their movement status, e.g. slow moving (if several are slow moving then there is congestion), stationary
(c) whenever a new vehicle is detected and/or at other intervals, send the results of (b) to the Determine and store local Host Vehicle conditions function in the vehicle detected nearby data flow.

Diagrams

The Diagram(s) is (are) the diagram(s) where you can find the function :
  • DFD 5.15.1 Provide Detection for the Vehicle Surroundings
  • Functional Tree of Area 5

    • Parent Higher Level Function

    Input logical dataflows

    Output logical dataflows

    User needs

    Number

    Description

    7.4.1.23
    Hazard Detection - The system shall be able to detect presence of other vehicles and traffic participants in the vicinity of the host vehicle, and determine its type, e.g. car, lorry, emergency, maintenance, cycle, pedestrian.
    7.4.1.24
    Hazard Detection - The system shall be able to determine the status of the traffic in the vicinity of the host vehicle, e.g. congestion, stationary vehicle(s).
    7.4.1.34
    Traffic Queue Detection - The system shall be able to inform drivers, via in-vehicle and road-side devices, of slow moving obstacles (e.g. person, animal, slow vehicle) and advise on the appropriate action (e.g. speed and lane).
    7.4.1.37
    Hazardous Location Notification - The system shall be able to warn driver, via an in-vehicle device, of adverse driving conditions ahead (e.g. slippery road, low visibility, queuing traffic) and advise on the appropriate action (e.g. speed).
    7.4.1.38
    Hazardous Location Notification - The system shall be able to warn drivers, via a road-side device, of adverse driving conditions ahead (e.g. slippery road, low visibility, queuing traffic) and advise on the appropriate action (e.g. speed).
    7.4.6.1
    The system shall be able to determine the type and current position of other vehicle(s) in the vicinity of the host vehicle, and to predict their future path(s).
    7.4.6.11
    The system shall be able to warn the driver, via an in-vehicle device, that another equipped vehicle is approaching the host vehicle from the front and in the same (partial) lane.
    7.4.6.12
    The system shall be able to warn the driver, via an in-vehicle device, that another equipped vehicle is approaching the host vehicle from the rear in the same (partial) lane and, when possible, provide advice, e.g. change to a safe adjacent lane, accelerate.
    7.4.6.13
    The system shall be able to warn the driver, via an in-vehicle device, that a slower equipped vehicle is ahead of the host vehicle and in the same (partial) lane and, when possible, provide advice, e.g. change to a safe adjacent lane, decelerate, brake.
    7.4.6.16
    The system shall be able to calculate the current and future trajectories of each vehicle and VRU approaching the host vehicle at an urban intersection and assess the potential for collisions with the host vehicle.
    7.4.6.17
    The system shall be able to warn the driver of the host vehicle, via an in-vehicle device, of any collisions that could occur with other vehicles and/or VRU that are approaching an urban intersection.
    7.4.6.18
    The system shall be able to use a road-side device to warn drivers of any collisions that could occur with other vehicles and/or VRU that are approaching an urban intersection.
    7.4.6.3
    The system shall be able to warn the driver approaching a junction, via an in-vehicle device, of other equipped vehicles approaching that junction.
    7.4.6.5
    The system shall be able to determine that the host vehicle is (about to) change lanes and warns the driver, via and in-vehicle device, if there are other equipped vehicles on potential collision path (e.g. motor-cycle in a blind spot).
    7.4.6.6
    The system shall be able to determine that the host vehicle is (about to) overtake, or turn across the road, and warns the driver, via and in-vehicle device, if there are other equipped vehicles on potential collision path (e.g. motor-cycle in a blind spot).
    7.4.8.5
    The system shall enable the trajectory of an emergency vehicle to be predicted and compared with the trajectories of other vehicles in the vicinity, and to warn the drivers of those other vehicles with a potential conflict, via an in-vehicle device.