ISO/PRF 19082

ISO/DISPRF 19082
ISO/TC 204
Secretariat: ANSI
Date: 2024-10-142025-09-04
Intelligent transport systems — Definition of data elements and data
frames between roadside modules and signal controllers for
cooperative signal control
DIS stage
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This document is not an ISO International Standard. It is distributed for review and comment. It is subject to change
without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which
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PROOF
ISO/DISPRF 19082:20242025(en)
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ISO/DISPRF 19082:20242025(en)
Contents
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Conformance . 3
6 Use cases . 3
6.1 General . 3
6.2 Macroscopic signal control systems . 3
6.3 Micro signal control systems . 5
6.4 Data frames for the use cases . 11
7 Data Elements and Frames . 11
7.1 General . 11
7.2 Data elements . 12
7.3 Data frames for processed and statistical data . 18
Annex A (normative) ASN.1 modules . 27
Annex B (informative) Data model . 34
Annex C (informative) Relationship with existing standards . 36
Bibliography . 43

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ISO/DISPRF 19082:20242025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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ISO documentsdocument should be noted. This document was drafted in accordance with the editorial rules
of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 204, Intelligent transport systems.
This first edition of ISO 19082 cancels and replaces the first edition of ISO/TS 19082:2020, which has been
technically revised.
The main changes are as follows:
— ASN.1 modules have been specified;
— certain data elements have been imported from other documents and the related references have been
clarified;
— an architecture reference model has been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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ISO/DISPRF 19082:20242025(en)
Introduction
Signal controllers and traffic control centres optimize signal timings based on real-time traffic information for
each approach. For example, signal controllers can extend the green time for an approach with a long queue.
The aim of this document is to define data elements and data frames that are useful for optimising local and
coordinated signal operation.
ISO 22951, on the pre-emption and prioritization signal system for emergency and public transport vehicles
(PRESTO), specifies the message sets for signal system pre-emption and priority for transit vehicles, including
communications between roadside modules and signal controllers. This document complements ISO 22951
by defining message sets for traffic information that is useful for optimizing normal signal operations. Thus,
signal controllers and traffic management centres can generate signal timings referring to the messages of ISO
22951 (PRESTO) and this document. The relationship between this document and ISO 22951 is shown in
Annex C.
The red arrows in Figure 1 illustrate message flows that are within scope of this document.
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ISO/DISPRF 19082:20242025(en)
Figure 1 — Physical scope of this document
Figure 2 shows where this document is positioned within the ITS station architecture, as defined in ISO 21217.
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ISO/DISPRF 19082:20242025(en)
Figure 2 — Architecture reference model
The messages specified in this document may be sent and received based on the facilities layer and lower layer
of the ITS station architecture. When using the ITS station architecture, for communicating the data specified
in this document, the communication profile can be appropriately selected using the process specified in ISO
17423. The lower layer communication services are provided by the communication profile hander (CPH)
specified in ISO 17429. ITS station management and communications between ITS stations are specified in
ISO 24102-6.
The data elements and data frames in this document are typically exchanged using well-known internet
protocols, such as UDP/IP or TCP/IP. IPsec, DTLS and TLS can be used for security.
The data structure follows the framework specified in ISO 14817-1, and the data elements and data frames
are described by description name, object identifier, definition, and data type following ISO 14817-1. The
specifications of this document complement those from ISO/TS 19091 and other standards.
NOTE Roadside modules can generate data based on inputs from vehicle detectors and/or probe data transmitted
by vehicles. This document does not address how the roadside module generates the data, it only addresses
communication after receiving and processing raw data from one or more sources.
EXAMPLE A roadside module may calculate vehicle volume, average speed, and queue length by utilizing data from
vehicle detectors and probe information.
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ISO/DISPRF 19082:20242025(en)
Intelligent transport systems — Definition of data elements and data
frames between roadside modules and signal controllers for
cooperative signal control
1 Scope
This document specifies data elements and data frames for messages
a) exchanged between roadside modules and:
1) Signalsignal controllers,;
2) Traffictraffic management centres, and/or;
3) Otherother roadside modules.
b) exchanged between traffic management centres and signal controllers.
This document addresses the data in the application layer of the OSI (Open Systems Interconnection)
reference model.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 14817-1, Intelligent transport systems — ITS central data dictionaries — Part 1: Requirements for ITS data
definitions
ISO 17419, Intelligent transport systems — Cooperative systems — Globally unique identification
SAE J2735, Dedicated Short Range Communications (DSRC) Message Set Dictionary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14817-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
adaptive signal control
signal control concept where vehicular traffic in a network is detected at one or more points upstream and/or
downstream and algorithmically combined with other information to predictively optimize traffic signal
operation
3.2
conflicting turn
turn manoeuvre that conflicts with another manoeuvre at an intersection
ISO/DISPRF 19082:20242025(en)
3.3
cooperative signal control
signal control utilizing not only vehicle detector data but also V2I communication data
3.4
dilemma zone
area upstream of a traffic signal in which different drivers are likely to make different decisions on whether
to continue through or stop at the signal as they see the signal indication change from green to yellow
Note 1 to entry: There are two types of dilemma zones. Type I occurs when yellow and red clearance times are too short
for a driver to either stop or clear the intersection before the beginning of a conflicting phase. Type II, also known as an
“Option Zone”, or “Indecision Zone”, occurs as the result of different drivers making different decisions on whether to go
or stop, upon the change from a green to yellow indication.
3.5
flow rate
equivalent hourly rate at which vehicles, bicycles or persons pass a point on a lane, roadway, or other traffic
way, computed as the number of vehicles, bicycles, or persons passing the point, divided by the time interval
(usually less than 1 h) in which they pass
Note 1 to entry: It is expressed as vehicles, bicycles or persons per hour.
3.6
phase
signal controller timing unit associated with the control of one or more movements.
3.7
probe data
vehicle sensor information, formatted as probe data elements and/or probe messages, that is processed,
formatted, and transmitted to a roadside module to create a good understanding of the driving environment
3.8
queue
line of vehicles, bicycles, or persons waiting to be served by the system in which the flow rate from the front
of the queue determines the average speed within the queue
Note 1 to entry: Slowly moving vehicles or people joining the rear of the queue are usually considered part of the queue.
The internal queue dynamics can involve starts and stops. A
...