Intelligent transport systems (ITS) standards and specifications (S&S) are grouped in the following classes.

Class code

Class name

Class description

000

Core requirements

Information common to more than one standard or specification in order to manage quality

001

Signs

Equipment which provides visual messages or warnings to the users of the transport network

002

Audio

Equipment which provides audio instructions, messages or warnings to the users of the transport network

003

Signals

Equipment which provides visual instructions (often legally enforceable) to the users of the transport network

004

Barriers

Remotely operated barriers or gates

005

Controllers

Field processing devices for roadside controls

006

Cameras

Equipment used to view and capture footage of activity on the transport network

007

Detection

Equipment used to sense and report on traffic, environmental and other conditions on the transport network

008

Communications infrastructure

Data communications and networking infrastructure and equipment

009

Power

Equipment and infrastructure used to power roadside devices

010

Civil infrastructure

Physical infrastructure critical to the delivery of ITS on the transport network

011

Enclosures

Cabinets and similar used to house roadside equipment

012

System interfaces

Logical interface standards required to connect ITS equipment