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 Government Reporting
Archive On–Line Analysis and Mining
CenterCenter Connected Vehicle Infrastructure Management
Center Data Collection
Center Data Subscription Management
Center Permission Management
Connected Vehicle Roadside EquipmentRSE Automated Vehicle Operations
RSE CACC Operations
Emergency Management CenterEmergency Call–Taking
Emergency Data Collection
Emergency Dispatch
Emergency Incident Command
Emergency Response Management
Emergency Routing
Emergency Secure Area Alarm Support
Emergency Vehicle OBEEV On–Board En Route Support
EV On–Board Incident Management Communication
EV Service Patrol Vehicle Operations
Emissions Management CenterEmissions Data Management
ITS ObjectITS Management Support
ITS Security Support
ITS Roadway EquipmentRoadway Barrier System Control
Roadway Basic Surveillance
Roadway Dynamic Lane Management and Shoulder Use
Roadway Emissions Monitoring
Roadway Environmental Monitoring
Roadway Field Device Support
Roadway Field Management Station Operation
Roadway HOV Control
Roadway Incident Detection
Roadway Reversible Lanes
Roadway Signal Control
Roadway Signal Preemption
Roadway Standard Rail Crossing
Roadway Traffic Information Dissemination
Roadway Traffic Metering
Roadway Variable Speed Limits
Roadway Warning
Roadway Work Zone Safety
Roadway Work Zone Traffic Control
ITS Roadway Payment EquipmentRoadway Payment Support
Roadway Toll Collection Support
Maint and Constr Management CenterMCM Environmental Information Collection
MCM Environmental Information Processing
MCM Incident Management
MCM Maintenance Decision Support
MCM Roadway Maintenance
MCM Vehicle Tracking
MCM Work Zone Management
MCM Work Zone Safety Management
Maint and Constr Vehicle OBEMCV Barrier System Control
MCV Roadway Maintenance and Construction
MCV Vehicle Location Tracking
MCV Vehicle Safety Monitoring
MCV Work Zone Support
Parking Management SystemParking Coordination
Parking Data Collection
Parking Electronic Payment
Parking Management
Parking Park and Ride Operations
Payment Administration CenterPAC Data Collection
PAC Payment Administration
Personal Information DevicePersonal Interactive Traveler Information
Personal Traveler Information Reception
Traffic Management CenterTMC Advanced Rail Crossing Management
TMC Automated Vehicle Operations
TMC Barrier System Management
TMC Basic Surveillance
TMC CACC Operations
TMC Data Collection
TMC Dynamic Lane Management and Shoulder Use
TMC Environmental Monitoring
TMC HOV Lane Management
TMC Incident Detection
TMC Incident Dispatch Coordination
TMC Multi–Modal Coordination
TMC Regional Traffic Management
TMC Reversible Lane Management
TMC Roadway Equipment Monitoring
TMC Service Patrol Management
TMC Signal Control
TMC Standard Rail Crossing Management
TMC Traffic Information Dissemination
TMC Traffic Management Decision Support
TMC Traffic Metering
TMC Traffic Network Performance Evaluation
TMC Variable Speed Limits
TMC Work Zone Traffic Management
Transit Management CenterTransit Center Data Collection
Transit Center Fare Management
Transit Center Fixed–Route Operations
Transit Center Information Services
Transit Center Paratransit Operations
Transit Center Security
Transit Center Vehicle Tracking
Transit Vehicle OBETransit Vehicle On–Board Fare Management
Transit Vehicle On–Board Information Services
Transit Vehicle On–Board Paratransit Operations
Transit Vehicle On–Board Trip Monitoring
Transit Vehicle Schedule Management
Transit Vehicle Security
Transit Vehicle Signal Priority
Transportation Information CenterTIC Connected Vehicle Traveler Info Distribution
TIC Data Collection
TIC Dynamic Ridesharing
TIC Emergency Traveler Information
TIC Freight–Specific Travel Planning
TIC Interactive Traveler Information
TIC Road Weather Advisories and Warnings
TIC Situation Data Management
TIC Traveler Information Broadcast
TIC Traveler Telephone Information
TIC Trip Planning
Traveler Support EquipmentTransit Stop Information Services
Traveler Information Reception
Vehicle OBEVehicle Basic Toll/Parking Payment
Vehicle Control Automation
Vehicle Cooperative Cruise Control
Vehicle Intersection Warning
Vehicle Location Determination
Vehicle Platoon Operations