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
Archived Data ManagementGovernment Reporting Systems Support
ITS Data Repository
Traffic and Roadside Data Archival
Commercial VehicleOn-board Cargo Monitoring
On-board CV Electronic Data
Emergency ManagementCenter Secure Area Alarm Support
Center Secure Area Surveillance
Emergency Call-Taking
Emergency Commercial Vehicle Response
Emergency Data Collection
Emergency Dispatch
Emergency Early Warning System
Emergency Environmental Monitoring
Emergency Evacuation Support
Emergency Response Management
Emergency Routing
Incident Command
Mayday Support
Service Patrol Management
Emergency VehicleOn-board EV En Route Support
On-board EV Incident Management Communication
Information Service ProviderBasic Information Broadcast
ISP Emergency Traveler Information
ISP Traveler Information Alerts
Maintenance and Construction ManagementMCM Data Collection
MCM Maintenance Decision Support
MCM Transportation Operations Data Collection
MCM Vehicle Tracking
MCM Winter Maintenance Management
Maintenance and Construction VehicleMCV Roadway Maintenance and Construction
MCV Vehicle Location Tracking
MCV Winter Maintenance
MCV Work Zone Support
Remote Traveler SupportRemote Transit Information Services
Traveler Secure Area Surveillance
RoadwayRoadside Lighting System Control
Roadway Basic Surveillance
Roadway Data Collection
Roadway Signal Controls
Roadway Signal Preemption
Roadway Signal Priority
Standard Rail Crossing
Traffic ManagementCollect Traffic Surveillance
TMC Demand Management Coordination
TMC Environmental Monitoring
TMC Incident Dispatch Coordination/Communication
TMC Lighting System Control
TMC Regional Traffic Management
TMC Roadway Warning
TMC Signal Control
TMC Traffic Management Decision Support
TMC Traffic Metering
TMC Traffic Network Performance Evaluation
TMC Transportation Operations Data Collection
Traffic Data Collection
Traffic Equipment Maintenance
Transit ManagementTransit Center Fare Management
Transit Center Fixed-Route Operations
Transit Center Paratransit Operations
Transit Center Passenger Counting
Transit Center Security
Transit Center Vehicle Tracking
Transit Data Collection
Transit Garage Maintenance
Transit Vehicle Assignment
Transit Vehicle Operator Assignment
Transit VehicleOn-board Maintenance
On-board Paratransit Operations
On-board Passenger Counting
On-board Schedule Management
On-board Transit Fare Management
On-board Transit Information Services
On-board Transit Trip Monitoring