STANDARD
ISO 22951:2009
Issue date: 2009 01 12
Data dictionary and message sets for preemption and prioritization signal systems for emergency and public transport vehicles (PRESTO)
ISO 22951:2009 relates to systems that use priority signal control functions to help emergency vehicles operate. This type of system is composed of a traffic management centre, in‑vehicle units, roadside communication units, and roadside units. Public transport vehicles such as buses are also targeted to receive priority signal control service.
The scope of standardization includes message sets and data dictionary related to the communications as follows:
- between a roadside communication unit and each in-vehicle unit,
- between a roadside communication unit and other roadside units,
- between in-vehicle units and roadside units.
ISO 22951:2009 concerns only information related to priority signal control and does not deal with information provision such as that of the situations at scenes. Since it is necessary to handle public transport vehicles in accordance with the conditions of individual cities and regions, the section in the messages and the data dictionary that are concerned with priority signal control for the vehicles are treated as an option. Furthermore, the standardization does not depend on the type of communication medium used.
General information on ISO 22951:2009
Frequently Asked Questions about ISO 22951:2009
When you purchase a standard from the Austrian Standards webshop (e.g. ÖNORM, ISO), a single-user licence is included as standard. This entitles a single person to use the standard. A multi-user licence is required if several employees need access. It enables company-wide, legally compliant use and sharing of standards.
Standardization thrives on expertise and participation. Anyone interested can play an active role in its further development – for example, by joining the relevant committee or a working group. In this way, you can help shape the content and contribute to advancing the state of the art.
If you have an extensive portfolio of standards, we recommend using a professional standards management tool. With effects 2.0, you can manage your standards centrally and efficiently. You can optimise your procurement processes and benefit from an integrated information and subscription service. This ensures you are always up to date and never miss any relevant developments.