Low Level Function
5.14.5 Provide Driver Trip Guidance Interface

Overview

This Function shall be capable of providing the following facilities:

(1) A HMI through which driving instructions and Estimated Time of Arrival (ETA) are output to the Driver.
(2) The HMI shall be able to output both sets of information continuously, updating the output immediately fresh data is received.
(3) If no data is received from which to generate the output, the HMI shall be able to output a warning message to the Driver to indicate that there is nothing to display.

Functional Requirements

(a) continuously monitor for the receipt of the input data flows
(b) when any of the data flows in (a) is received, display its contents immediately
(c) if no input is received after a set time interval, display a warning message to say that no data is available.

Diagrams

The Diagram(s) is (are) the diagram(s) where you can find the function :
  • DFD 5.14 Provide In-vehicle Trip Planning & Implementation
  • Functional Tree of Area 5

    • Parent Higher Level Function

    Input logical dataflows

    Output logical dataflows

    User needs

    Number

    Description

    6.2.3.5
    The system shall be able to provide customised on-trip information to hand-held and in-vehicle devices.
    6.4.1.1
    The system shall be able to provide guidance to Car Parks (with parking spaces).
    6.4.1.5
    The system shall be able to provide guidance to "Points of Interest".
    7.5.1.18
    The system shall be able to inform the driver, via an in-vehicle device, that an incident has been detected ahead on the selected route and provide a revised route.
    7.5.1.23
    The system shall inform the driver via an in-vehicle device that the vehicle has departed from the selected route and a revised route has been requested.
    7.6.2.9
    The system shall be able to provide the driver, via an in-vehicle device, with an estimated time of arrival which is updated at regular intervals.