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 Management SubsystemGovernment Reporting Systems Support
ITS Data Repository
Traffic and Roadside Data Archival
Commercial Vehicle AdministrationCredentials and Taxes Administration
Emergency ManagementCenter Secure Area Alarm Support
Center Secure Area Sensor Management
Center Secure Area Surveillance
Emergency Call-Taking
Emergency Commercial Vehicle Response
Emergency Data Collection
Emergency Dispatch
Emergency Early Warning System
Emergency Evacuation Support
Emergency Response Management
Emergency Routing
Incident Command
Service Patrol Management
Emergency Vehicle SubsystemOn-board EV En Route Support
On-board EV Incident Management Communication
Information Service ProviderBasic Information Broadcast
Interactive Infrastructure Information
ISP Emergency Traveler Information
Maintenance and Construction ManagementMCM Automated Treatment System Control
MCM Data Collection
MCM Environmental Information Collection
MCM Environmental Information Processing
MCM Incident Management
MCM Infrastructure Monitoring
MCM Maintenance Decision Support
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
MCM Work Zone Safety Management
Maintenance and Construction VehicleMCV Roadway Maintenance and Construction
MCV Vehicle Location Tracking
MCV Vehicle Safety Monitoring
MCV Vehicle System Monitoring and Diagnostics
MCV Winter Maintenance
MCV Work Zone Support
Parking ManagementParking Coordination
Parking Electronic Payment
Parking Management
Remote Traveler SupportRemote Transit Fare Management
Remote Transit Information Services
Roadway SubsystemField Barrier System Control
Roadway Automated Treatment
Roadway Basic Surveillance
Roadway Data Collection
Roadway Environmental Monitoring
Roadway Freeway Control
Roadway Incident Detection
Roadway Probe Data Communications
Roadway Signal Controls
Roadway Signal Priority
Roadway Traffic Information Dissemination
Roadway Work Zone Safety
Roadway Work Zone Traffic Control
Standard Rail Crossing
Security Monitoring SubsystemField Secure Area Sensor Monitoring
Field Secure Area Surveillance
Traffic ManagementCollect Traffic Surveillance
HRI Traffic Management
TMC Environmental Monitoring
TMC Evacuation Support
TMC Freeway Management
TMC Incident Detection
TMC Incident Dispatch Coordination/Communication
TMC Probe Information Collection
TMC Regional Traffic Management
TMC Signal Control
TMC Traffic Information Dissemination
TMC Transportation Operations Data Collection
TMC Work Zone Traffic Management
Traffic Data Collection
Traffic Maintenance
Transit ManagementTransit Center Fare Management
Transit Center Fixed-Route Operations
Transit Center Information Services
Transit Center Multi-Modal Coordination
Transit Center Paratransit Operations
Transit Center Security
Transit Center Signal Priority
Transit Center Vehicle Tracking
Transit Data Collection
Transit Evacuation Support
Transit Garage Maintenance
Transit Transportation Operations Data Collection
Transit Vehicle Operator Assignment
Transit Vehicle SubsystemOn-board Maintenance
On-board Paratransit Operations
On-board Schedule Management
On-board Transit Fare Management
On-board Transit Security
On-board Transit Signal Priority
On-board Transit Trip Monitoring