Overview

This Function shall be capable of providing the following facilities:

(1) The ability to receive and store data for information and warning messages plus commands that have been output to Drivers of preceding Vehicles using the urban road network.
(2) Use internal sensors to detect that a Vehicle is approaching.
(3) When an approaching Vehicle is detected, the ability to output to it the data for information and warning messages plus commands relevant to the management of traffic using the urban road network.
(4) The ability to continue with the output to approaching Vehicles, changing the data every time it is changed, and stopping output if there is no data to transmit.

Functional Requirements

(a) continuously monitor for receipt of the urban data for approaching vehicles data flow from the Ouput c&i to Divers using Urban Roads function
(b) using internal sensors to detect the presence of approaching vehicles, putting the data in the urban vehicle presence for messages data flow from the traffic entity
(c) when the data flow is received in (a) store its contents
(d) an approach vehicle is detected in (b), output the data stored in (c) in the data flow containing approaching vehicles urban messages
(e) repeat (c) for every approaching vehicle, unless there is no data to output
(f) if the data flow received in (b) contains no data, clear the stored message data.

Diagrams

Parent Higher Level Function

• 3.1.1.5 Provide Urban Traffic Management Facilities

Input logical dataflows

• ftrfc-urban_vehicle_presence_for_messages
• mt_urban_data_for_approaching_vehicles

Output logical dataflows

• mt.pshvs_approaching_vehicles_urban_messages

User needs