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
On-Line Analysis and Mining
Traffic and Roadside Data Archival
Virtual Data Warehouse Services
Commercial VehicleOn-board Cargo Monitoring
On-board Trip Monitoring
Commercial Vehicle AdministrationCredentials and Taxes Administration
CV Information Exchange
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 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
Emissions ManagementEmissions Data Collection
Emissions Data Management
Fleet and Freight ManagementFleet Administration
Fleet Credentials and Taxes Management and Reporting
Fleet HAZMAT Management
Fleet Maintenance Management
Information Service ProviderBasic Information Broadcast
Infrastructure Provided Trip Planning
Interactive Infrastructure Information
ISP Emergency Traveler Information
ISP Probe Information Collection
ISP Traveler Data Collection
ISP Traveler Information Alerts
Traveler Telephone Information
Maintenance and Construction ManagementMCM 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 Barrier System Control
MCV Environmental Monitoring
MCV Infrastructure Monitoring
MCV 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 Data Collection
Parking Electronic Payment
Parking Management
Payment AdministrationCenter VMT Payment Administration
Toll Administration
Toll Data Collection
Personal Information AccessPersonal Autonomous Route Guidance
Personal Basic Information Reception
Personal Interactive Information Reception
Personal Location Determination
Personal Mayday I/F
Remote Traveler SupportRemote Basic Information Reception
Remote Interactive Information Reception
Remote Transit Fare Management
Remote Transit Information Services
RoadwayField Barrier System Control
Multimodal Crossing Control
Roadway Basic Surveillance
Roadway Data Collection
Roadway Dynamic Lane Management and Shoulder Use
Roadway Emissions Monitoring
Roadway Environmental Monitoring
Roadway Equipment Coordination
Roadway Field Device Monitoring
Roadway Incident Detection
Roadway Mixed Use Sensing
Roadway Probe Data Communications
Roadway Reversible Lanes
Roadway Safety Warning System
Roadway Signal Controls
Roadway Signal Preemption
Roadway Signal Priority
Roadway Speed Monitoring and Warning
Roadway Traffic Information Dissemination
Roadway Traffic Metering
Roadway Variable Speed Limits
Roadway Warning
Roadway Work Zone Safety
Roadway Work Zone Traffic Control
Standard Rail Crossing
Roadway PaymentToll Plaza Toll Collection
Security MonitoringField Secure Area Sensor Monitoring
Field Secure Area Surveillance
Traffic ManagementBarrier System Management
Collect Traffic Surveillance
HRI Traffic Management
Rail Operations Coordination
TMC Demand Management Coordination
TMC Dynamic Lane Management and Shoulder Use
TMC Environmental Monitoring
TMC Evacuation Support
TMC HOV Lane Management
TMC Incident Detection
TMC Incident Dispatch Coordination/Communication
TMC Multimodal Coordination
TMC Multimodal Crossing Management
TMC Probe Information Collection
TMC Regional Traffic Management
TMC Reversible Lane Management
TMC Roadway Warning
TMC Signal Control
TMC Speed Monitoring and Warning
TMC Traffic Information Dissemination
TMC Traffic Metering
TMC Variable Speed Limits
TMC Work Zone Traffic Management
Traffic Data Collection
Traffic Equipment Maintenance
Transit ManagementTransit Center Connection Protection
Transit Center Fare Management
Transit Center Fixed-Route Operations
Transit Center Information Services
Transit Center Multi-Modal Coordination
Transit Center Paratransit Operations
Transit Center Passenger Counting
Transit Center Security
Transit Center Signal Priority
Transit Center Vehicle Tracking
Transit Data Collection
Transit Environmental Monitoring
Transit Evacuation Support
Transit Garage Maintenance
Transit Transportation Operations Data Collection
Transit VehicleOn-board Connection Protection
On-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 Security
On-board Transit Signal Priority
On-board Transit Trip Monitoring
VehicleBasic Vehicle Reception
Interactive Vehicle Reception
Vehicle Automated Operations
Vehicle Autonomous Route Guidance
Vehicle Lateral Warning System
Vehicle Location Determination
Vehicle Longitudinal Control
Vehicle Longitudinal Warning System
Vehicle Mayday I/F
Vehicle On-board Diagnostics System
Vehicle Pre-Crash Safety Systems
Vehicle Safety Monitoring System
Vehicle Toll/Parking Interface
Vehicle Traffic Probe Support
Vehicle Warning System