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. The first two 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.

Subsystem Functional Area
Archived Data System Archive Data Repository Functional Area
Archive Government Reporting
Archive On–Line Analysis and Mining
Archive Situation Data Archival
Border Inspection Administration Center Border Inspection Administration
Border Inspection System Border Inspection
Commercial Vehicle Administration Center CVAC Credentials and Taxes Administration
CVAC Information Exchange
CVAC International Administration
CVAC Safety and Security Administration
Commercial Vehicle Check Equipment CVCE Citation and Accident Electronic Recording
CVCE Electronic Screening
CVCE International Border Crossing
CVCE Safety and Security Inspection
CVCE Weigh–In–Motion
Commercial Vehicle OBE CV On–Board Cargo Monitoring
CV On–Board Drayage Support
CV On–Board Electronic Screening Support
CV On–Board Safety and Security
CV On–Board Trip Monitoring
Connected Vehicle Roadside Equipment RSE Automated Vehicle Operations
RSE Environmental Monitoring
RSE Intersection Management
RSE Intersection Safety
RSE Queue Warning
RSE Restricted Lanes Application
RSE Situation Monitoring
RSE Speed Management
RSE Traffic Monitoring
RSE Traveler Information Communications
Emergency Management Center Emergency Call–Taking
Emergency Commercial Vehicle Response
Emergency Data Collection
Emergency Dispatch
Emergency Early Warning System
Emergency Environmental Monitoring
Emergency Evacuation Support
Emergency Incident Command
Emergency Response Management
Emergency Routing
Emergency Secure Area Alarm Support
Emergency Secure Area Sensor Management
Emergency Secure Area Surveillance
Emergency Vehicle OBE EV On–Board En Route Support
EV On–Board Incident Management Communication
EV Service Patrol Vehicle Operations
Emissions Management Center Emissions Connected Vehicle Monitoring
Emissions Data Collection
Emissions Data Management
Emissions Zone Management
Fleet and Freight Management Center Fleet Administration
Fleet Maintenance Management
Freight Administration and Management
Freight Distribution and Logistics Center Drayage Operations Optimization Service
Intermodal Terminal Terminal Management
ITS Roadway Equipment Roadway Basic Surveillance
Roadway Dynamic Lane Management and Shoulder Use
Roadway Emissions Monitoring
Roadway Environmental Monitoring
Roadway Field Management Station Operation
Roadway Incident Detection
Roadway Infrastructure Monitoring
Roadway Lighting System Control
Roadway Mixed Use Crossing Safety
Roadway Passive Monitoring
Roadway Restriction Monitoring and Warning
Roadway Signal Control
Roadway Signal Preemption
Roadway Speed Monitoring and Warning
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 Equipment Roadway Toll Collection Support
Maint and Constr Management Center MCM Data Collection
MCM Environmental Information Collection
MCM Environmental Information Processing
MCM Field Equipment Maintenance
MCM Incident Management
MCM Infrastructure Monitoring
MCM Maintenance Decision Support
MCM Roadway Maintenance
MCM Vehicle Maintenance Management
MCM Vehicle Tracking
MCM Winter Maintenance Management
MCM Work Activity Coordination
MCM Work Zone Management
MCM Work Zone Safety Management
Maint and Constr Vehicle OBE MCV Roadway Maintenance and Construction
MCV Vehicle Location Tracking
MCV Vehicle Safety Monitoring
MCV Vehicle System Monitoring and Diagnostics
MCV Winter Maintenance
MCV Work Zone Support
Parking Management System Parking Coordination
Parking Electronic Payment
Parking Management
Parking Park and Ride Operations
Payment Administration Center PAC Data Collection
PAC Payment Administration
Personal Information Device Personal Interactive Traveler Information
Personal Intersection Safety
Personal Local Route Guidance
Personal Shared Use Planning
Personal Traveler Information Reception
Personal Trip Planning and Route Guidance
Security Monitoring Equipment Field Secure Area Sensor Monitoring
Field Secure Area Surveillance
Traffic Management Center TMC Advanced Rail Crossing Management
TMC Automated Vehicle Operations
TMC Basic Surveillance
TMC Data Collection
TMC Demand Management Coordination
TMC Dynamic Lane Management and Shoulder Use
TMC Environmental Monitoring
TMC Evacuation Support
TMC Incident Detection
TMC Incident Dispatch Coordination
TMC Infrastructure Restriction Warning
TMC Intersection Safety
TMC In–Vehicle Signing Management
TMC Multi–Modal Coordination
TMC Passive Surveillance
TMC Regional Traffic Management
TMC Restricted Lanes CV Application
TMC Roadway Equipment Monitoring
TMC Roadway Warning
TMC Service Patrol Management
TMC Signal Control
TMC Situation Data Management
TMC Speed Warning
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 Center Transit Center Data Collection
Transit Center Environmental Monitoring
Transit Center Fare Management
Transit Center Fixed–Route Operations
Transit Center Information Services
Transit Center Multi–Modal Coordination
Transit Center Operator Assignment
Transit Center Paratransit Operations
Transit Center Park and Ride Operations
Transit Center Passenger Counting
Transit Center Priority Management
Transit Center Security
Transit Center Vehicle Assignment
Transit Center Vehicle Tracking
Transit Garage Maintenance
Transit Vehicle OBE Transit Vehicle On–Board Fare Management
Transit Vehicle On–Board Information Services
Transit Vehicle On–Board Maintenance
Transit Vehicle On–Board Paratransit Operations
Transit Vehicle On–Board Trip Monitoring
Transit Vehicle Passenger Counting
Transit Vehicle Schedule Management
Transit Vehicle Security
Transit Vehicle Signal Priority
Transportation Information Center TIC Data Collection
TIC Dynamic Ridesharing
TIC Emergency Traveler Information
TIC Interactive Traveler Information
TIC Operations Data Collection
TIC Road Weather Advisories and Warnings
TIC Shared Use
TIC Situation Data Management
TIC Traveler Information Broadcast
TIC Trip Planning
Traveler Support Equipment Transit Stop Information Services
Traveler Information Reception
Vehicle OBE Vehicle Basic Safety Communication
Vehicle Basic Toll/Parking Payment
Vehicle Control Automation
Vehicle Control Warning
Vehicle Environmental Monitoring
Vehicle Interactive Traveler Information
Vehicle Intersection Warning
Vehicle Local Route Guidance
Vehicle Payment Service
Vehicle Platoon Operations
Vehicle Queue Warning
Vehicle Restricted Lanes Application
Vehicle Roadside Information Reception
Vehicle Situation Data Monitoring
Vehicle Speed Management Assist
Vehicle Traveler Information Reception
Vehicle Trip Planning and Route Guidance