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
Emergency ManagementCenter Secure Area Sensor Management
Center Secure Area Surveillance
Emergency Call-Taking
Emergency Dispatch
Emergency Early Warning System
Emergency Environmental Monitoring
Emergency Evacuation Support
Emergency Response Management
Emergency Routing
Emergency Transportation Operations Data Collection
Incident Command
Service Patrol Management
Emergency VehicleOn-Board EV Barrier System Control
On-board EV En Route Support
On-board EV Incident Management Communication
Emissions ManagementEmissions Data Collection
Emissions Data Management
Information Service ProviderInfrastructure Provided Dynamic Ridesharing
Infrastructure Provided Trip Planning
Interactive Infrastructure Information
ISP Emergency Traveler Information
ISP Probe Information Collection
ISP Short Range Communications Traveler Information Distribution
ISP Travel Services Information and Reservation
ISP Traveler Data Collection
ISP Traveler Information Alerts
Traveler Telephone Information
Maintenance and Construction ManagementMCM Automated Treatment System Control
MCM Environmental Information Collection
MCM Environmental Information Processing
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
Personal Information AccessPersonal Basic Information Reception
Personal Interactive Information Reception
Personal Trip Planning and Route Guidance
RoadwayField Barrier System Control
Field Management Stations Operation
Field Safeguard System Control
Roadway Automated Treatment
Roadway Automated Vehicle Operations
Roadway Basic Surveillance
Roadway Environmental Monitoring
Roadway Equipment Coordination
Roadway Field Device Monitoring
Roadway Incident Detection
Roadway Infrastructure Monitoring
Roadway Intersection Safety Warning
Roadway Mixed Use Sensing
Roadway Probe Data Communications
Roadway Safety Warning System
Roadway Short Range Traveler Information Communications
Roadway Signal Controls
Roadway Signal Preemption
Roadway Signal Priority
Roadway Speed Monitoring and Warning
Roadway Traffic Information Dissemination
Roadway Traffic Metering
Roadway Warning
Roadway Work Zone Safety
Roadway Work Zone Traffic Control
Standard Rail Crossing
Traffic ManagementBarrier System Management
Collect Traffic Surveillance
HRI Traffic Management
TMC Automated Vehicle Operations
TMC Environmental Monitoring
TMC Evacuation Support
TMC Incident Detection
TMC Incident Dispatch Coordination/Communication
TMC In-Vehicle Signing Management
TMC Multimodal Coordination
TMC Probe Information Collection
TMC Regional Traffic Management
TMC Roadway Warning
TMC Signal Control
TMC Speed Monitoring and Warning
TMC Traffic Information Dissemination
TMC Traffic Metering
TMC Transportation Operations Data Collection
TMC Work Zone Traffic Management
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 Evacuation Support
Transit Garage Maintenance
Transit Transportation Operations Data Collection
Transit Vehicle Assignment
Transit Vehicle Operator Assignment
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 In Vehicle Signing Communications
On-board Transit Information Services
On-board Transit Security
On-board Transit Signal Priority
On-board Transit Trip Monitoring
VehicleDriver Safety Monitoring System
Driver Visibility Improvement System
Interactive Vehicle Reception
Vehicle Automated Operations
Vehicle Environmental Probe Support
Vehicle Intersection Control
Vehicle Intersection Safety Warning
Vehicle Lateral Control
Vehicle Lateral Warning System
Vehicle Location Determination
Vehicle Longitudinal Control
Vehicle Longitudinal Warning System
Vehicle Pre-Crash Safety Systems
Vehicle Safety Monitoring System
Vehicle Short Range Traveler Information Reception
Vehicle Toll/Parking Interface
Vehicle Trip Planning and Route Guidance
Vehicle Warning System