Entities

An entity is defined in the National ITS Architecture as either a subsystem or terminator. Subsystems are internal to the ITS architecture whereas terminators are at the boundary of the ITS architecture. The groupings below contain the subsystems first followed by the terminators.

ITS Architecture Subsystems

Centers

Authorizing Center (AC)
Center (CTR)
Electric Charging Management Center (ECMC)
Emergency Management Center (EMC)
Emissions Management Center (EMMC)
Fleet and Freight Management Center (FFMC)
Maint and Constr Management Center (MCMC)
Parking Management Center (PMC)
Payment Administration Center (PAC)
Shared Use Transportation Center (SUTC)
Traffic Management Center (TMC)
Transit Management Center (TRMC)
Transportation Information Center (TIC)

Roadside

Connected Vehicle Roadside Equipment (RSE)
Electric Charging Station (ECS)
Field (FLD)
ITS Roadway Equipment (ITSRE)
Parking Area Equipment (PAE)
Security Monitoring Equipment (SME)
Traveler Support Equipment (TSE)

Traveler

Personal (P)
Personal Information Device (PID)

Vehicle

ITS Architecture Terminators

Environment

Vulnerable Road Users (VRU)

Human

Maint and Constr Field Personnel (MCFP)
Maint and Constr Vehicle Operator (MCVO)
Pedestrian (PED)

Other System

None

System

Alerting and Advisory System (AAS)
Alternate Mode Transportation Center (AMTC)
Archived Data User System (ADUS)
Asset Management System (AMS)
Basic Vehicle (BV)
Electric Utility (EU)
Emergency Communications System (ECS)
Enforcement Center (EC)
Event Promoter System (EPS)
Location and Time Data Source (LTDS)
Media (M)
Payment Device (PAYD)
Public Health System (PHS)
Rail Operations Center (ROC)
Surface Transportation Weather Service (STWS)
Traveler Card (TC)
Weather Service System (WSS)

Last Updated: 2/7/2024

Back to Top