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
Virtual Data Warehouse Services
Commercial Vehicle CheckRoadside WIM
Emergency ManagementCenter Secure Area Alarm Support
Center Secure Area Sensor Management
Center Secure Area Surveillance
Emergency Call-Taking
Emergency Data Collection
Emergency Dispatch
Emergency Early Warning System
Emergency Environmental Monitoring
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
Emissions ManagementEmissions Data Management
Information Service ProviderBasic Information Broadcast
Infrastructure Provided Trip Planning
Interactive Infrastructure Information
ISP Emergency Traveler Information
ISP Traveler Data Collection
ISP Traveler Information Alerts
Traveler Telephone Information
Maintenance and Construction ManagementMCM Environmental Information Collection
MCM Environmental Information Processing
MCM Incident Management
MCM Roadway Maintenance and Construction
MCM Vehicle Tracking
MCM Work Activity Coordination
MCM Work Zone Management
Maintenance and Construction VehicleMCV Vehicle Location Tracking
MCV Work Zone Support
Personal Information AccessPersonal Interactive Information Reception
Remote Traveler SupportRemote Interactive Information Reception
Remote Transit Fare Management
Remote Transit Information Services
Roadway SubsystemField Barrier System Control
Roadway Basic Surveillance
Roadway Emissions Monitoring
Roadway Environmental Monitoring
Roadway Equipment Coordination
Roadway Freeway Control
Roadway Signal Controls
Roadway Signal Priority
Roadway Speed Monitoring
Roadway Traffic Information Dissemination
Roadway Work Zone Traffic Control
Standard Rail Crossing
Security Monitoring SubsystemField Secure Area Sensor Monitoring
Field Secure Area Surveillance
Toll AdministrationToll Administration
Toll CollectionToll Plaza Toll Collection
Traffic ManagementBarrier System Management
Collect Traffic Surveillance
HRI Traffic Management
TMC Environmental Monitoring
TMC Evacuation Support
TMC Freeway Management
TMC Incident Detection
TMC Incident Dispatch Coordination/Communication
TMC Multimodal Coordination
TMC Regional Traffic Management
TMC Signal Control
TMC Speed Monitoring
TMC Traffic Information Dissemination
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 Passenger Counting
Transit Center Security
Transit Center Signal Priority
Transit Center Vehicle Tracking
Transit Data Collection
Transit Evacuation Support
Transit Garage Maintenance
Transit Vehicle Assignment
Transit Vehicle Operator Assignment
Transit Vehicle SubsystemOn-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
VehicleVehicle Toll/Parking Interface