Low Level Function
6.3.13 Provide Traveller Trip Interface

Overview

This Function shall be capable of providing the following facilities:

(1) A HMI through which the Traveller can request the implementation of a trip plan, be given trip navigation instructions or manage changes to the trip plan that is currently being implemented.
(2) The ability for the HMI to output in whatever form best suits the Traveller the instructions for implementing the trip plan that are provided by the Implement Trip Plan and Track Traveller function.
(3) If a proposal is received for revising the trip plan that is being implemented, the ability of the HMI to display details of the proposed changes to the Traveller and send back the response that is received to the Manage Revised Trip Plan Creation for Traveller function.
(4) The ability for the HMI to receive requests for changes to the trip plan from the Traveller and also send them to the Manage Revised Trip Plan Creation for Traveller function.

Functional Requirements

(a) continuously monitor for receipt of the trip plan implementation data flow
(b) when the data flow in (a) is received, put the contents in the implement trip plan data flow and send it to the Manage Store of Trip Plan Data function
(c) as a result of (b) continuously monitor for receipt of the trip guidance instructions data flow
(d) when the data flow in (c) is received, output the instructions to the Traveller in the most appropriate form using the route guidance information data flow
(e) continuously monitor for receipt of the trip plan changes for traveller data flow
(f) when the data flow in (e) is received, output the details of the changes to the Traveller in the implement trip plan changes data flow
(g) as a result of (f), continuously monitor for receipt of the trip plan change data flow
(h) when the data flow in (g) is received put the contents in the trip plan changes response data flow and send it to the Manage Production of Revised Trip Plan function
(i) continuously monitor for receipt of the request implementing trip plan change data flow
(j) when the data flow in (i) is received, put the contents on the trip plan changes request data flow and send it to the Manage Production of Revised Trip Plan function
(k) repeat (d) and (f)
(l) continuously monitor for receipt of the GTP data updates data flow
(m) when the data flow in (l) is received, send the data to the Evaluate Trip After Completion function in the trip results from traveller data flow.

Diagrams

The Diagram(s) is (are) the diagram(s) where you can find the function :
  • DFD 6.3 Support Trip
  • Functional Tree of Area 6

    • Parent Higher Level Function

    Input logical dataflows

    Output logical dataflows

    User needs

    Number

    Description

    6.1.0.3
    The system shall be able to provide accurate, credible, timely, and easy to comprehend traffic and travel information where it may be of benefit to the user.
    6.1.2.3
    The system shall be able to provide information to all drivers including route restrictions, travel times, etc.
    6.2.0.4
    The system shall provide traffic information to the traveller during his/her trip in a timely manner, and include travel conditions, accidents, special events, car park status, etc.
    6.2.0.5
    The system shall be able to provide urban and inter-urban traffic and travel information to drivers about the domain they are not currently in.
    6.2.0.6
    The system shall inform the User when changes occur to the criteria upon which the pre trip information had been given.
    6.2.2.1
    The system shall be able to inform travellers on the current average travel time between fixed points.
    6.2.2.13
    The system shall be able to provide information to vehicle drivers in case of medical emergency, e.g. location of rest areas, medical assistance, etc.
    6.2.2.2
    The system shall be able to provide real-time P&R and PT information to vehicle drivers.
    6.2.2.3
    The system shall be able to provide cyclists and pedestrians with information about suitable routes.
    6.2.2.4
    The system shall provide road and traffic safety advice based on current weather and traffic conditions.
    6.2.2.5
    The system shall be able to provide information to all drivers including route restrictions, travel times, etc.
    6.2.3.2
    The system shall normally provide messages from a finite set of well defined messages.
    6.2.3.3
    The system shall provide information in the native language at the output location, and/or from a user selected choice of other appropriate foreign languages, when applicable.
    6.2.3.4
    The system shall provide information using "open" standard communication protocols.
    6.2.3.5
    The system shall be able to provide customised on-trip information to hand-held and in-vehicle devices.
    6.4.0.4
    The system shall be able to modify its navigation instructions if an incorrect turn is made.
    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".
    6.4.2.3
    The system shall enable bi-directional voice and data communication with the vehicle.
    7.6.2.11
    The system shall enable a traveller to request and receive, via an in-vehicle device, personalised on-trip alternative journey plans (to avoid an incident) and to accept/reject the proposal(s).
    7.6.2.15
    The system shall enable the service provided to the traveller to be passed from one Service Provide to another as the traveller changes areas of coverage.