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
Emergency ManagementCenter Secure Area Alarm Support
Emergency Call-Taking
Emergency Data Collection
Emergency Dispatch
Emergency Response Management
Emergency Routing
Incident Command
Service Patrol Management
Emergency VehicleOn-board EV En Route Support
On-board EV Incident Management Communication
Emissions ManagementEmissions Data Management
Information Service ProviderBasic Information Broadcast
Infrastructure Provided Dynamic Ridesharing
Infrastructure Provided Trip Planning
Interactive Infrastructure Information
ISP Data Collection
ISP Operational Data Repository
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 Maintenance Decision Support
MCM Roadway Maintenance and Construction
MCM Transportation Operations Data Collection
MCM Vehicle Tracking
MCM Work Zone Management
MCM Work Zone Safety Management
Maintenance and Construction VehicleMCV Barrier System Control
MCV Roadway Maintenance and Construction
MCV Vehicle Location Tracking
MCV Vehicle Safety Monitoring
MCV Work Zone Support
Parking ManagementParking Coordination
Parking Data Collection
Parking Electronic Payment
Parking Management
Payment AdministrationToll Administration
Toll Data Collection
Personal Information AccessPersonal Basic Information Reception
Personal Interactive Information Reception
Remote Traveler SupportRemote Basic Information Reception
Remote Transit Information Services
RoadwayField Barrier System Control
Field Management Stations Operation
Roadway Automated Vehicle Operations
Roadway Basic Surveillance
Roadway Dynamic Lane Management and Shoulder Use
Roadway Emissions Monitoring
Roadway Environmental Monitoring
Roadway Equipment Coordination
Roadway Field Device Monitoring
Roadway HOV Control
Roadway Incident Detection
Roadway Intersection Safety Warning
Roadway Reversible Lanes
Roadway Signal Controls
Roadway Signal Preemption
Roadway Signal Priority
Roadway Traffic Information Dissemination
Roadway Traffic Metering
Roadway Variable Speed Limits
Roadway Warning
Roadway Work Zone Safety
Roadway Work Zone Traffic Control
Roadway PaymentToll Plaza Toll Collection
Traffic ManagementCollect Traffic Surveillance
TMC Automated Vehicle Operations
TMC Demand Management Coordination
TMC Dynamic Lane Management and Shoulder Use
TMC Environmental Monitoring
TMC HOV Lane Management
TMC Incident Detection
TMC Incident Dispatch Coordination/Communication
TMC Multimodal Coordination
TMC Probe Information Collection
TMC Regional Traffic Management
TMC Reversible Lane Management
TMC Signal Control
TMC Traffic Information Dissemination
TMC Traffic Management Decision Support
TMC Traffic Metering
TMC Traffic Network Performance Evaluation
TMC Transportation Operations Data Collection
TMC Variable Speed Limits
TMC Work Zone Traffic Management
Traffic Data Collection
Traffic Equipment Maintenance
Transit ManagementTransit Center Fare Management
Transit Center Fixed-Route Operations
Transit Center Information Services
Transit Center Paratransit Operations
Transit Center Security
Transit Center Vehicle Tracking
Transit Data Collection
Transit Transportation Operations Data Collection
Transit VehicleOn-board Paratransit Operations
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
VehicleVehicle Automated Operations
Vehicle Intersection Control
Vehicle Intersection Safety Warning
Vehicle Location Determination
Vehicle Toll/Parking Interface
Vehicle Traffic Probe Support