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
- Center (CTR)
- Commercial Vehicle Administration Center (CVAC)
- 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)
- Traffic Management Center (TMC)
- Transit Management Center (TRMC)
- Transportation Information Center (TIC)
Roadside
- Commercial Vehicle Check Equipment (CVCE)
- Connected Vehicle Roadside Equipment (RSE)
- Field (FLD)
- ITS Roadway Equipment (ITSRE)
- ITS Roadway Payment Equipment (RPE)
- Parking Area Equipment (PAE)
- Security Monitoring Equipment (SME)
- Traveler Support Equipment (TSE)
Support
- Archived Data System (ADS)
- Data Distribution System (DDS)
- ITS Communications Equipment (ICE)
Traveler
- None
Vehicle
- Commercial Vehicle OBE (CVOBE)
- Emergency Vehicle OBE (EVOBE)
- Maint and Constr Vehicle OBE (MCVOBE)
- Transit Vehicle OBE (TVOBE)
- Vehicle OBE (VOBE)
ITS Architecture Terminators
Environment
- None
Human
- Parking Operator (POP)
Other System
- None
System
- Alerting and Advisory System (AAS)
- Alternate Mode Transportation Center (AMTC)
- Archived Data User System (ADUS)
- Asset Management System (AMS)
- Emergency Telecommunications System (ETS)
- Event Promoter System (EPS)
- Financial Center (FC)
- Maint and Constr Administrative Systems (MCAS)
- Media (M)
- Multimodal Crossing Equipment (MCE)
- Payment Device (PAYD)
- Rail Operations Center (ROC)
- Shelter Provider Center (SPC)
- Surface Transportation Weather Service (STWS)
- Traveler Card (TC)
- Traveler Information Voice System (TIVS)
- Weather Service System (WSS)