Functions 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 physical objects from ARC–IT. The general descriptions associated with these physical objects 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 Objects" that provide additional functional detail. At the most detailed level, each functional object includes several specific Functional Requirements that more precisely specify the functions to be performed. All three levels of detail are available on this web site. The subsystems and functional objects 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 SystemArchive Data Repository
Archive Situation Data Archival
CenterCenter Data Collection
Commercial Vehicle OBECV On–Board Signal Priority
Connected Vehicle Roadside EquipmentRSE Environmental Monitoring
RSE Intersection Management
RSE Intersection Safety
RSE Lighting System Support
RSE Situation Monitoring
RSE Traffic Monitoring
RSE Traveler Information Communications
Emergency Management CenterEmergency Call–Taking
Emergency Dispatch
Emergency Early Warning System
Emergency Evacuation Support
Emergency Incident Command
Emergency Incident Scene Safety Management
Emergency Response Management
Emergency Routing
Emergency Vehicle OBEEV On–Board En Route Support
EV On–Board Incident Management Communication
EV Service Patrol Vehicle Operations
Emissions Management CenterEmissions Data Management
FieldField System Executive
Field System Monitoring and Diagnostics
ITS ObjectITS Communications Support
ITS Security Support
ITS Roadway EquipmentRoadway Basic Surveillance
Roadway Data Collection
Roadway Emissions Monitoring
Roadway Environmental Monitoring
Roadway Field Device Support
Roadway Field Management Station Operation
Roadway Incident Detection
Roadway Infrastructure Monitoring
Roadway Lighting System Control
Roadway Mixed Use Crossing Safety
Roadway Passive Monitoring
Roadway Signal Control
Roadway Signal Preemption
Roadway Speed Monitoring and Warning
Roadway Standard Rail Crossing
Roadway Traffic Information Dissemination
Roadway Traffic Metering
Roadway Warning
Roadway Work Zone Traffic Control
Maint and Constr Management CenterMCM Incident Management
MCM Infrastructure Monitoring
MCM Maintenance Decision Support
MCM Roadway Maintenance
Parking Management SystemParking Coordination
Parking Data Collection
Parking Management
Parking Park and Ride Operations
Personal Information DevicePersonal Interactive Traveler Information
Personal Traveler Information Reception
Security Monitoring EquipmentField Secure Area Sensor Monitoring
Field Secure Area Surveillance
Traffic Management CenterTMC Basic Surveillance
TMC Demand Management Coordination
TMC Evacuation Support
TMC HOV Lane Management
TMC Incident Detection
TMC Incident Dispatch Coordination
TMC Passive Surveillance
TMC Regional Traffic Management
TMC Roadway Equipment Monitoring
TMC Service Patrol Management
TMC Signal Control
TMC Situation Data Management
TMC Traffic Information Dissemination
TMC Traffic Metering
TMC Traffic Network Performance Evaluation
TMC Work Zone Traffic Management
Transit Management CenterTransit Center Fare Management
Transit Center Fixed–Route Operations
Transit Center Information Services
Transit Center Paratransit Operations
Transit Center Vehicle Tracking
Transit Evacuation Support
Transit Garage Maintenance
Transit Vehicle OBETransit Vehicle On–Board Fare Management
Transit Vehicle On–Board Maintenance
Transit Vehicle On–Board Paratransit Operations
Transit Vehicle On–Board Trip Monitoring
Transit Vehicle Schedule Management
Transit Vehicle Signal Priority
Transportation Information CenterTIC Connected Vehicle Traveler Info Distribution
TIC Data Collection
TIC Dynamic Ridesharing
TIC Emergency Traveler Information
TIC Interactive Traveler Information
TIC Operations Data Collection
TIC Traveler Information Broadcast
TIC Traveler Telephone Information
TIC Trip Planning
Traveler Support EquipmentTraveler Fare Management
Vehicle OBEVehicle Basic Safety Communication
Vehicle Basic Toll/Parking Payment
Vehicle Emergency Notification
Vehicle Interactive Traveler Information
Vehicle Payment Service
Vehicle Restricted Lanes Application
Vehicle Roadside Information Reception
Vehicle Situation Data Monitoring
Vehicle Traveler Information Reception
Vehicle Trip Planning and Route Guidance