This Function shall be capable of providing the following facilities:<br/><br/>(1) A HMI that enables the Road Network Operator to manage the control of traffic using the inter-urban road network.<br/>(2) The HMI shall enable the Road Network Operator to provide commands that change the current inter-urban traffic control strategy and to override the use of lanes in the road network, except when it is imposed as part of an incident or demand management strategy, or to provide selective Vehicle priority.<br/>(3) The HMI shall have the ability to inform the Road Network Operator of the success or failure of the requested change.<br/>(4) The HMI shall have to ability to output requests to the Road Network Operator for a check to be made of the availability of auxiliary lanes (hard shoulders), and for the Operator to provide an available/not available response so that traffic can be directed to use it, or not.<br/>
(a) continuously monitor for receipt of the inter-urban command output override or request inter-urban output monitoring data flows from the Road Network Operator;<br/>(b) when the first data flow in (a) is received, check its contents to see if it is imposing or cancelling an override;<br/>(c) if in (b) an override is being imposed, send the details to the Output Inter-urban Traffic Commands & Messages function in the inter-urban command override status data flow;<br/>(d) if in (b) an override is being cancelled, send the cancellation request to the Output Inter-urban Traffic Commands & Messages function in the inter-urban command override status data flow;<br/>(e) as a result of (c) or (d), continuously monitor for receipt of the inter-urban command override response data flow from the Output Inter-urban Traffic Commands & Messages function;<br/>(f) when the data flow in (e) is received, output its contents to the Road Network Operator in the inter-urban command override response data flow;<br/>(g) if the second data flow in (a) is received, check its contents and send the request for output to be monitored to the Output Inter-urban Traffic Commands & Messages function in the inter-urban command monitoring status data flow;<br/>(h) as a result of (g), continuously monitor for receipt of the inter-urban command monitoring response data flow from the Output Inter-urban Traffic Commands & Messages function;<br/>(i) when the data flow in (h) is received, output its contents to the Road Network Operator in the inter-urban command monitoring response data flow.<br/>
