Low Level Function
3.2.14 Send Incident Details to Vehicles
Overview
This Function shall be capable of providing the following facilities:
(1) The ability to manage the output of instructions contained in an incident strategy to other functionality in the Vehicle in response to incidents that have been detected by other functionality.
(2) The ability for the instructions that are sent out to require the output of information to the Drivers.
(3) The ability for the output of the instructions to Vehicles to begin as soon as the strategy information has been received, but only if it is relevant for the geographic location of the road network that is being managed by the System.
(4) The ability to keep a local store of the strategies currently being implemented and delete them when their expiry time has passed, or when a strategy modification or removal indication arrives from the management functionality.
Functional Requirements
(a) continuously monitor for the receipt of the input data flows
(b) when the location data flow is received in (a) store it locally and use it to determine the location
(c) when the incident details data flow is received in (a) check to see if it contains new information about an existing or new incident that does not indicate that the incident is now closed
(d) if the check in (b) is positive, check that the data is relevant to the location
(e) if the check in (d) is positive (the data is relevant) put the data into the output data flow and send it to the appropriate functionality in the vehicle
(f) in addition to the requirement in (b), store the data locally
(g) if the check in (b) shows that a previous incident is now closed, repeat (c) and delete all data about the incident from the local store.
Diagrams
Parent Higher Level Function
Input logical dataflows
Output logical dataflows
User needs
Number | Description |
| (X)FCD - The system shall be able to communicate with another vehicle either directly, or via an road-side device. (Communications). |
| 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. |
| 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. |
| 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. |
| 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). |
| 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. |