Low Level Function
5.16.2 Output Commands and Dynamic Warnings

Overview

This Function shall be capable of providing the following facilities:

(1) The ability to receive the currently valid warnings, lane instructions and traffic regulations for the section of the road network in which the Vehicle is currently located or is about to enter.
(2) A HMI through which the messages to the Driver can be displayed according to the determined priority of messages.
(3) The ability of the HMI to use replicas of the appropriate international roadside signage (according to ISO TS14823:2008) and not "custom" versions of roadside signage in the displays to the Driver.
(4) The ability of the HMI to display the outputs in a way that avoids overloading or distracting the Driver with too much or irrelevant information.
(5) The HMI shall enable the Driver to request output of the most relevant outputs about incidents.
(6) The ability for the HMI to display a message to the Driver saying that a particular service is unavailable, when no data that is relevant to that service has been received for a suitable period of time.

Functional Requirements

(a) continuously monitor for the receipt of any of the input data flows from other functionality that contain information to be output to the driver
(b) whenever new content, error or instructions data flows are received in (a), store their contents locally and display them to the driver through the appropriate output data flow, using replicas of international roadside signs where they exist in a standard way and according to the appropriate standards, e.g. the Vienna convention
(c) if the number of valid warnings, lane instructions and traffic regulations received in (b) exceeds the maximum amount to be displayed simultaneously, sequence handling shall be executed
(d) when determining which messages to display in (c). the most messages likely to have the most immediate and serious impact on vehicle and occupant safety shall be displayed first
(e) if a lane banning instruction is received in a data flow in (a), it must be acknowledged using the lane acknowledgement data flow
(f) if the possible roadside command & warning error data flow is received in (a) and it contains details of a difference, output the possible command & warning data flow to the driver
(g) only continue the output in (f) for as long as the input data flow in (f) contains details of a difference and remove the output to the driver in (f) when it does not
(h) continuously monitor for receipt of the request relevant incident information data flow from the driver
(i) when the data flow in (h) is received repeat the output of all incident related messages to the driver using the appropriate output data flows
(j) if none of the data flows are received in (a) for a period of time, the display shall show a "system not working" indication.

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

    7.4.1.29
    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.
    7.4.2.2
    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.
    7.4.3.1
    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.
    7.4.4.12
    The system shall be able to compare the reported speed of a vehicle with the current legal speed limit and display a warning to the driver, via a road-side device, if its current speed is greater than the legal speed limit.
    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.
    7.6.3.4
    The system shall enable the Access Control Centre to monitor all equipped vehicles, and the traffic, within a “sensitive area” and to send instructions to the drivers of the equipped vehicles.
    7.6.3.6
    The system shall enable the host vehicle to close the contact with the Access Control Centre when it leaves the “sensitive area” and to create a report for the freight vehicle driver.
    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.