This Function shall be capable of providing the following facilities:<br/><br/>(1) The ability to detect Vehicles approaching a part of the inter-urban road network (zone or "sensitive area"), access to which is controlled. <br/>(2) The ability to obtain and the identity and a physical image of the Vehicle from its own sensors.<br/>(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.<br/>(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.<br/>(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.<br/>
(a) continuously monitor for the arrival of the vehicle list data flow and when it arrives, update the internal list with the information that it contains;<br/>(b) continuously monitor for the arrival of the vehicle approaching data flow;<br/>(c) when the data flow in (b) is received continuously monitor for the arrival of the vehicle image data flow;<br/>(d) when the data flow in (c) arrives, determine the vehicle identity from the image and check it against the list provided in (a);<br/>(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;<br/>(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.<br/>
