MARC Home Page > Transportation Department > ITS Architecture > Subsystems
Subsystems
are the principal structural element of the ITS architecture and represent
the individual pieces of the intelligent transportation system. They are
grouped into the following four classes:
- Centers
–
Subsystems that provide management, administrative, and support functions
for the transportation system. The center subsystems each communicate
with other centers to enable coordination between modes and across jurisdictions.
Some examples of center subsystems are Traffic Management, Transit Management,
and Emergency Management.
- Roadside
–
Intelligent infrastructure distributed along the transportation
network which perform surveillance, information provision, and plan
execution control functions and whose operation is governed by center
subsystems. Roadside subsystems also directly interface to vehicle subsystems.
- Travelers
–
Equipment used by travelers to access ITS services pre-trip and
en-route. This includes services that are owned and operated by the
traveler as well as services that are owned by transportation and information
providers.
- Vehicles
–
Covers ITS related elements on vehicle platforms. Vehicle subsystems
include general driver information and safety systems applicable to
all vehicle types. Three fleet vehicle subsystems (Transit, Emergency,
and Commercial Vehicles) add ITS capabilities unique to these special
vehicle types.
