This Function shall be capable of providing the following facilities:<br/><br/>(1) The ability to provide a physical barrier to prevent Vehicles from entering a part (zone) of the inter-urban road network, to which access is controlled.<br/>(2) The ability to output (zone) a warning message to Drivers that a physical barrier will prevent them driving their Vehicles into the zone.<br/>(3) If the Vehicles are detected actually entering the zone, the ability to send the Vehicle identity to the law enforcement functionality.<br/>
(a) continuously monitor for the arrival of the vehicle identity and inter-urban sensitive area access refused data flows;<br/>(b) when either of the data flows in (a) is received, start monitoring for the vehicle entering inter-urban zone data flow;<br/>(c) when the data flow in (b) is received, send a warning of illegal entry to the driver in the entering inter-urban zone data flow;<br/>(d) if the data flow in (b) continues to show that the vehicle is entering the zone then send the vehicle entering message to the Provide Support for Law Enforcement functionality.<br/>
