Functional Requirements

Functional requirements are a description of WHAT the system has to do. In the architecture, functions are defined at several different levels. Each inventory element is mapped to one or more subsystems and terminators from the National ITS Architecture. The general descriptions associated with these entities identify functionality in a very general sense. At the next level of detail, most of the ITS elements have been mapped to one or more "Functional Areas" that provide additional functional detail. At the most detailed level, each functional area includes several specific Functional Requirements that precisely specify the functions to be performed. All three levels of detail are available on this web site. The subsystems and functional areas that are associated with the regional ITS architecture are listed in the table below. Each table entry is a link to more detailed descriptions and functional requirements.

SubsystemFunctional Area
Emergency ManagementEmergency Call-Taking
Emergency Commercial Vehicle Response
Emergency Dispatch
Emergency Early Warning System
Emergency Evacuation Support
Emergency Response Management
Emergency Routing
Incident Command
Emergency VehicleOn-board EV En Route Support
On-board EV Incident Management Communication
Maintenance and Construction ManagementMCM Environmental Information Collection
MCM Incident Management
MCM Roadway Maintenance and Construction
MCM Vehicle and Equipment Maintenance Management
MCM Vehicle Tracking
MCM Winter Maintenance Management
MCM Work Activity Coordination
MCM Work Zone Management
Maintenance and Construction VehicleMCV Roadway Maintenance and Construction
MCV Vehicle Location Tracking
MCV Vehicle Safety Monitoring
MCV Work Zone Support
Personal Information AccessPersonal Basic Information Reception
Personal Interactive Information Reception
Remote Traveler SupportRemote Basic Information Reception
Remote Interactive Information Reception
Remote Transit Information Services
RoadwayField Management Stations Operation
Roadside Lighting System Control
Roadway Basic Surveillance
Roadway Environmental Monitoring
Roadway Equipment Coordination
Roadway Field Device Monitoring
Roadway Incident Detection
Roadway Probe Data Communications
Roadway Short Range Traveler Information Communications
Roadway Signal Controls
Roadway Speed Monitoring and Warning
Roadway Traffic Information Dissemination
Roadway Variable Speed Limits
Roadway Warning
Roadway Work Zone Safety
Roadway Work Zone Traffic Control
Traffic ManagementCollect Traffic Surveillance
TMC Environmental Monitoring
TMC Evacuation Support
TMC Incident Detection
TMC Incident Dispatch Coordination/Communication
TMC In-Vehicle Signing Management
TMC Lighting System Control
TMC Probe Information Collection
TMC Regional Traffic Management
TMC Roadway Warning
TMC Signal Control
TMC Speed Monitoring and Warning
TMC Traffic Information Dissemination
TMC Work Zone Traffic Management
Traffic Equipment Maintenance
Transit ManagementTransit Center Fixed-Route Operations
Transit Center Information Services
Transit Center Security
Transit VehicleOn-board Schedule Management
On-board Transit In Vehicle Signing Communications
On-board Transit Information Services
On-board Transit Security