Low Level Function
5.16.1 Manage Communication from Vehicle to Driver

Overview

This Function shall be capable of providing the following facilities:

(1) The ability to receive dynamic warnings and instructions about various situations and events that will affect the progress of the Vehicle through the road network.
(2) The ability to filter these dynamic warnings and instructions according to the current Vehicle location.
(3) The ability to send the filtered dynamic warnings and instructions for display to the Driver.
(4) The ability to process warnings that include accidents, incidents, wrong-way drivers, hazardous weather conditions, roadworks, predicted traffic conditions and congestion.
(5) The ability for each item of information sent for output to the Driver to be given a priority level based on such things as their relevance to the location of the Vehicle, the likelihood that the Vehicle will encounter them, and their possible affect on the safety of the Vehicle and its occupants.
(6) The ability to filter the warnings and instructions so that only those that are appropriate and relevant to the current location of the Vehicle are sent for output to the Driver.


Functional Requirements

(a) continuously monitor for receipt of any of the input data flows
(b) when in (a) a new traffic regulation, lane command, or either of the queue information data flows are received, it shall be filtered according to the current location of the vehicle determined in (i) below
(c) the resulting filtered data shall be passed on to the Output Commands and Dynamic Warnings function for display to the driver using the content for driver output data flow
(d) the information shall also be sent in the information to other vehicles data flow to the Provide Vehicle to Vehicle Communications function so that it can be forwarded to other vehicle
(e) whenever a new dynamic warning is received, it shall be passed on for display to the driver at the pre-coded location using the content for driver output data flow which is sent to the Output Commands and Dynamic Warnings function
(f) whenever a new lane instruction is received, it is passed on for display to the driver at the pre-coded location
(g) when the data flow containing location data is received in (a), calculate the current location of the vehicle and store it internally for use within the function
(h) all data that is received shall be checked against the location of the vehicle determined from the data provided in (f) to ensure that only the data that is appropriate and relevant to the vehicle and its direction of travel is sent for output to the driver by the Provide Dynamic Warnings and Lane Instructions function.

Diagrams

The Diagram(s) is (are) the diagram(s) where you can find the function :
  • DFD 5.16 Provide Outputs to Host Vehicle Drivers
  • Functional Tree of Area 5

    • Parent Higher Level Function

    Input logical dataflows

    Output logical dataflows

    User needs

    Number

    Description

    7.1.7.6
    The system shall be able to support an in-vehicle database of road network data (e.g. speed limits, road hazards, junctions etc.).
    7.4.1.29
    Motorcycle Warning - The system shall be able to detect that the host motorcycle has fallen onto the road pavement, and send this information to other vehicles.
    7.4.1.31
    Traffic Condition Warning - The system shall be able to warn drivers in a timely manner of moving incidents (e.g. road/winter maintenance vehicles, long/wide loads) via an in-vehicle display.
    7.4.1.33
    Traffic Queue Detection - The system shall be able to locate the tail end of a traffic queue and estimate its speed of propagation.
    7.4.1.35
    Hazardous Location Notification - The system shall be able to warn drivers in a timely manner of incidents ahead (e.g. road works, accident, traffic queue) via an in-vehicle display.  Where available and relevant this information shall include lane(s)/road section(s) affected and expected delay.
    7.4.1.36
    Hazardous Location Notification - The system shall be able to warn the driver in a timely manner, via an in-vehicle display, of adverse road surfaces and weather conditions along the planned route.
    7.4.1.44
    Hazardous Location Notification - The system shall be able to send information about incidents ahead in the next section from a road-side device to drivers via an in-vehicle device.
    7.4.1.47
    Hazardous Location Notification - The system shall be able to send information about incidents on the road network ahead from the TCC to drivers via an in-vehicle device.
    7.4.1.48
    Hazardous Location Notification - The system shall provide "copies" of the traffic signs that are relevant to the current section of the road (e.g. speed limit, road hazards, junctions) to the driver at all times via an in-vehicle display.
    7.4.1.49
    Hazardous Location Notification - The system shall be able to send to following vehicles "copies" of the traffic signs, or information about the local traffic (e.g. sudden congestion), that it may be useful to receive in advance.
    7.4.2.2
    The system shall be able to warn drivers in a timely manner of self-reporting ghost drivers via an in-vehicle display.
    7.4.2.4
    The system shall be able to detect that a vehicle is overtaking (i.e. in the wrong lane) on a two-lane road and that there is another vehicle approaching in that lane, and provide a warning to the drivers of both vehicles via their in-vehicle devices.
    7.4.2.5
    The system shall provide "copies" of the traffic signs that are relevant to the current section of the road (e.g. speed limit, road hazards, junctions) to the driver at all times via an in-vehicle display.
    7.4.2.6
    The system shall be able to send to following vehicles "copies" of the traffic signs, or information about the local traffic (e.g. sudden congestion), that it may be useful to receive in advance.
    7.4.3.1
    The system shall be able to provide lane usage information to the driver via an in-vehicle display.
    7.4.3.10
    The system shall be able to send to following vehicles "copies" of the traffic signs, or information about the local traffic (e.g. sudden congestion), that it may be useful to receive in advance.
    7.4.3.2
    The system shall be able to provide lane restriction information (e.g. HGV, HOV) from outside the vehicle and to confirm that it is consistent with the information that has been sent directly to that vehice.
    7.4.3.3
    The system shall be able to provide instructions not to change lanes to the driver via an in-vehicle device in order to stabilise the total traffic flow.  These instructions may either apply to all types of vehicle, or to sub-sets.
    7.4.3.4
    The system shall provide information to the driver via an in-vehicle display when auxiliary lanes are now available for use by that type of vehicle (e.g. hard shoulder running).
    7.4.3.6
    The system shall be able to provide lane usage information to the driver via an in-vehicle display when there are temporary restrictions to lane usage (e.g. at road works).
    7.4.3.7
    The system shall be able to advise a driver, via an in-vehicle device, which lane to use when passing an incident/accident.
    7.4.3.8
    The system shall be able to advise a driver, via an in-vehicle device, where to stop safely (e.g. an appropriate exit lane, hard shoulder).
    7.4.3.9
    The system shall provide "copies" of the traffic signs that are relevant to the current section of the road (e.g. speed limit, road hazards, junctions) to the driver at all times via an in-vehicle display.
    7.4.4.5
    The system shall enable the driver of the host vehicle, via an in-vehicle device, to receive safety-related information (e.g. legal speed limit, recommended speed limit) from other vehicles in the vicinity.
    7.4.6.23
    The system shall be able to provide a warning to the driver, via an in-vehicle display, that other drivers ahead are performing an emergency brake manoeuvre.
    7.4.6.25
    The system shall be able to provide a warning to the driver, via an in-vehicle display, that other vehicles behind are behaving in a dangerous manner (e.g. over speed limit, below minimum headway).
    7.4.6.4
    The system shall be able to warn the driver approaching a junction, via an in-vehicle device, of an equipped emergency vehicle that is approaching that junction.
    7.4.8.3
    The system shall enable an emergency vehicle to request a “blue wave” from those other vehicles that are in its path.
    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.
    7.4.8.6
    The system shall be able to inform the driver of the host vehicle, via an in-vehicle device, that an emergency vehicle is approaching, and in sufficient time to enable a “blue corridor” to be created by all equipped vehicles.
    7.4.8.7
    The system shall be able to advise the driver, via an in-vehicle device, of an appropriate lane to use to create a “blue corridor”.
    7.5.1.11
    The system shall be able to provide the driver, via an in-vehicle device, and on request, details of the (predicted) traffic situation in a defined area of interest, and for a time horizon, that has been selected by the driver.  This information shall be updated at (selected) intervals.
    7.5.1.20
    The system shall enable the TCC to instruct drivers, via an in-vehicle device, of an alternative route that should be followed (to avoid an incident).
    7.5.1.8
    The system shall enable the TCC to inform drivers, via an in-vehicle device, about (foreseen and unexpected) incidents on the driver’s planned route.
    7.5.1.9
    The system shall be able to warn the driver, via an in-vehicle device, of incidents in the urban road network as they are detected.
    7.5.2.12
    The system shall enable the host vehicle to receive a message that another vehicle is about to go through a red traffic signal, and to provide a warning to the driver, via an in-vehicle device.
    7.6.2.10
    The system shall enable the driver to (request and) receive, via an in-vehicle device, personalised on-trip information about incidents that may affect the planned journey.
    8.5.5.1
    The system shall provide “copies” of the traffic signs that are relevant to the current section of the road (e.g. speed limit, road hazards, junctions) to the driver at all times.
    8.5.5.2
    The system shall be able to send to following vehicles “copies” of the traffic signs, or information about the local traffic (e.g. sudden congestion), that it may be of useful to receive in advance.