ISO 8855-2011 PDF

Full title and description

Road vehicles — Vehicle dynamics and road‑holding ability — Vocabulary. ISO 8855:2011 defines principal terms and nomenclature used in vehicle dynamics and road‑holding for passenger cars, buses, commercial vehicles with one or more steered axles, and multi‑unit vehicle combinations, providing a standardized vocabulary for designers, testers and researchers.

Abstract

ISO 8855:2011 provides agreed definitions of the key terms used to describe vehicle motion, handling and road‑holding ability. The vocabulary supports consistent reporting, testing and communication across vehicle dynamics engineering, test procedures and regulatory or standards documents.

General information

• Status: Published (International Standard, confirmed review stage).
• Publication date: December 2011 (edition 2, published December 2011 / listed 15 Dec 2011 in national catalogues).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 01.040.43 (Road vehicle engineering — vocabularies); 43.020 (Road vehicles in general).
• Edition / version: Edition 2 (ISO 8855:2011).
• Number of pages: 42 (ISO‑published pagination).

Scope

Defines and clarifies the principal terms used in the field of road vehicle dynamics and road‑holding ability, covering kinematic and dynamic variables (for example yaw, roll, pitch, lateral acceleration), handling descriptors (understeer, oversteer, steady‑state directional response), steering and tyre/road interaction vocabulary, and reference points/axis systems used in measurements. The terms are applicable to passenger cars, buses, commercial vehicles with steered axles and multi‑unit vehicle combinations to ensure consistent use of terminology across tests, specifications and publications.

Key topics and requirements

• Standardized definitions for vehicle motion variables (yaw rate, lateral acceleration, roll, pitch, etc.).
• Terminology for directional control and handling (understeer/oversteer, steady‑state directional response, limit of controllability).
• Vocabulary for steering system terms and steering geometry references.
• Definitions related to tyre/road interaction and road‑holding ability.
• Reference axis systems, vehicle reference points and mass/loading conditions used in dynamics descriptions.
• Support for consistent interpretation of test procedures and test results across related ISO handling and dynamic test standards.

Typical use and users

Used by vehicle dynamics engineers, test engineers and test laboratories, vehicle manufacturers, regulatory and type‑approval authorities, standards committees, academic researchers and technical authors. It is referenced when writing test procedures, interpreting handling data, preparing technical reports or harmonizing terminology across international documents and products.

Related standards

Commonly used alongside related ISO and international standards for vehicle handling and test methods, for example ISO 4138 (steady‑state circular driving / handling tests), ISO 7401 (lateral transient response test methods), and more recent vehicle dynamics and simulation validation standards such as ISO 19364. It also supersedes the earlier ISO 8855:1991 vocabulary edition.

Keywords

vehicle dynamics, road‑holding, handling, vocabulary, terminology, yaw, roll, pitch, lateral acceleration, understeer, oversteer, steering, tyre‑road interaction, ISO 8855.

FAQ

Q: What is this standard?

A: ISO 8855:2011 is an ISO International Standard that defines the vocabulary used to describe road vehicle dynamics and road‑holding ability.

Q: What does it cover?

A: It covers agreed definitions for kinematic and dynamic variables, handling descriptors, steering and tyre/road interaction terms, reference axis systems and other terminology needed for consistent description and testing of vehicle dynamics.

Q: Who typically uses it?

A: Vehicle dynamics and test engineers, OEM development teams, test laboratories, regulators, standards committees, and academic researchers use the vocabulary to ensure consistent language in tests, reports, specifications and regulations.

Q: Is it current or superseded?

A: ISO 8855:2011 is the second edition published in December 2011; it superseded ISO 8855:1991. The ISO record lists the 2011 edition as published and subject to periodic review under ISO procedures.

Q: Is it part of a series?

A: It is part of the body of ISO standards for road vehicles and vehicle dynamics (work of ISO/TC 22/SC 33) and is commonly referenced together with handling and test method standards such as ISO 4138, ISO 7401 and ISO 19364.

Q: What are the key keywords?

A: vehicle dynamics, road‑holding, handling, vocabulary, terminology, yaw, roll, pitch, lateral acceleration, understeer, oversteer, steering, tyre‑road interaction.