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
CenterCenter Data Collection
Electric Charging StationElectric Charging Station Management
Emergency Management CenterEmergency Call–Taking
Emergency Data Collection
Emergency Dispatch
Emergency Evacuation Support
Emergency Incident Command
Emergency Response Management
Emergency Routing
Emergency Vehicle OBEEV On–Board En Route Support
EV Service Patrol Vehicle Operations
ITS ObjectITS Management Support
ITS Security Support
ITS Roadway EquipmentRoadway Automated Treatment
Roadway Basic Surveillance
Roadway Data Collection
Roadway Signal Control
Roadway Signal Preemption
Roadway Speed Monitoring and Warning
Roadway Standard Rail Crossing
Roadway Traffic Information Dissemination
Maint and Constr Management CenterMCM Automated Treatment System Control
MCM Incident Management
MCM Roadway Maintenance
MCM Vehicle Tracking
MCM Winter Maintenance Management
MCM Work Zone Management
Maint and Constr Vehicle OBEMCV Vehicle Location Tracking
MCV Winter Maintenance
Traffic Management CenterTMC Basic Surveillance
TMC Data Collection
TMC Evacuation Support
TMC Regional Traffic Management
TMC Signal Control
TMC Traffic Information Dissemination
TMC Traffic Network Performance Evaluation
Transit Management CenterTransit Center Data Collection
Transit Center Fixed–Route Operations
Transit Center Information Services
Transit Center Passenger Counting
Transit Center Security
Transit Center Vehicle Assignment
Transit Center Vehicle Tracking
Transit Evacuation Support
Transit Garage Maintenance
Transit Vehicle OBETransit Vehicle On–Board Fare Management
Transit Vehicle On–Board Information Services
Transit Vehicle On–Board Maintenance
Transit Vehicle On–Board Trip Monitoring
Transit Vehicle Passenger Counting
Transit Vehicle Security
Transit Vehicle Signal Priority
Traveler Support EquipmentTransit Stop Information Services