Overview

This Function shall be capable of providing the following facilities:

(1) The ability to detect Vehicles approaching a part of the inter-urban road network (zone or "sensitive area"), access to which is controlled.
(2) The ability to obtain and the identity and a physical image of the Vehicle from its own sensors.
(3) The ability to check the physical images of Vehicles obtained from its own sensors with a list of permitted Vehicles that it has been given by other functionality, as part of the traffic management strategy being currently implemented.
(4) The ability to output a warning message to Drivers of Vehicles whose identities do not match those on the permitted list as they approach a point in the inter-urban road network that gives access to a zone.
(5) The ability to send data about a Vehicle that has been detected approaching a zone to the functionality that manages access to sensitive areas.

Functional Requirements

(a) continuously monitor for the arrival of the vehicle list data flow and when it arrives, up date the internal list with the information that it contains
(b) continuously monitor for the arrival of the vehicle approaching data flow
(c) when the data flow in (b) is received continuously monitor for the arrival of the vehicle image data flow
(d) when the data flow in (c) arrives, determine the vehicle identity from the image and check it against the list provided in (a)
(e) if no match is found, send a warning to the driver in the approaching inter-urban zone data flow and send the vehicle identity data flow to the Prevent Access function
(f) if a match is found, send an advisory message to the driver in the approaching inter-urban zone data flow and data about the vehicle to the Manage Data about Vehicle use of Sensitive Areas in the vehicle nearing inter-urban sensitive area data flow.

Diagrams

Parent Higher Level Function

• 3.1.2.13 Manage Inter-urban Traffic Strategies

Input logical dataflows

• ftrfc-vehicle_approaching_inter-urban_zone
• fv-identity_for_inter-urban_zone_access
• mt_inter-urban_zone_access_vehicle_list

Output logical dataflows

• mt.pscs_vehicle_nearing_inter-urban_sensitive_area
• mt_inter-urban_zone_vehicle_identity
• td-approaching_inter-urban_zone

User needs