Overview

This Function shall be capable of providing the following facilities:

(1) The provision of a HMI through which the Emergency Vehicle Driver can be presented with details of the route to be followed by the Emergency Vehicle.
(2) The ability to receive data from other functionality about the route that the Emergency Vehicle is to follow.
(3) The ability to request that traffic signal intersection controllers provide local priority to the Emergency Vehicle in accordance with a route provided by the Emergency Vehicle Driver.
(4) The ability to maintain the up to date details of the current location of the Emergency Vehicle for use in local priority requests.
(5) The ability to request the deployment of "virtual cones" at an incident location, following a command from the Emergency Vehicle Driver.
(6) The ability to inform other suitably equipped Vehicles that an Emergency Vehicle is approaching.

Functional Requirements

(a) continuously monitor for receipt of any of the input data flows
(b) when the planned emergency route data flow is received in (a) implement the route that it contains
(c) use the data in the digital map data for emergency vehicle and location data flows to determine which part of the emergency route is to be implemented next and for which guidance will be needed
(d) using the results from (c), provide route guidance instructions to the emergency vehicle driver using the emergency route guidance data flow
(e) use the data in (c) to determine which are the next road segments and use this data in the emergency vehicle approaching data flow which shall be sent to the Mange Infrastructure to Vehicle Communications function
(f) the activities in (d) and (e) shall stop when the data in (b) and (c) shows that the emergency vehicle has reached the end of the green wave route
(g) when the green wave request data flow is received in (a) from the emergency vehicle driver, use the data in the digital map data for emergency vehicle and location data flows to determine the location and identity of the next signalised junction in the direction of travel of the vehicle
(h) put the data obtained in (g) into the emergency local priority request data flow and send it to the Output Stop & Go Commands function so that local priority can be provided
(i) repeat (g) and (h) until the green wave request data flow contains a null indicating that priority is not longer required
(j) when the deploy virtual cones data flow is received in (a) from the emergency vehicle driver, use the use the data in the digital map data for emergency vehicle and location data flows to determine where the virtual cones need to be deployed
(k) put the data obtained in (j) into whichever is appropriate of the inter-urban virtual coned area request and/or urban virtual coned area request data flows and send them the appropriate Implement Traffic Control function
(l) when the global emergency progress report data flow is received in (a) output its contents to the emergency vehicle driver in the global emergency data flow
(m) when the individual emergency progress report data flow is received in (a) from the emergency vehicle driver, use its contents to create the report and send it to the Process Emergency Progress Reports function in the individual emergency progress report data flow.

Diagrams

Parent Higher Level Function

• 2.1 Manage Emergencies

Input logical dataflows

• fd.e-deploy_virtual_cones
• fd.e-green_wave_request
• fd.e-individual_emergency_progress_report
• fesp.g-digital_map_data_for_emergency_vehicle
• flds-psef_location_data
• psef_global_emergency_progress_report
• psef_planned_emergency_route

Output logical dataflows

• psef.mt_emergency_local_priority_request
• psef.mt_inter-urban_virtual_coned_area_request
• psef.mt_urban_virtual_coned_area_request
• psef.pshvs_emergency_vehicle_approaching
• psef_individual_emergency_progress_report
• td.e-emergency_route_guidance
• td.e-global_emergency

User needs