ISO 22178-2009 PDF

Full title and description

ISO 22178:2009 — Intelligent transport systems — Low speed following (LSF) systems — Performance requirements and test procedures. The standard defines basic control strategies, minimum functionality, driver‑interface elements, diagnostics and failure responses, and performance test procedures for low‑speed car‑following systems intended to reduce driver workload in congested traffic.

Abstract

ISO 22178:2009 specifies the basic control strategy and minimum functional requirements for Low Speed Following (LSF) systems, plus required driver‑interface elements, diagnostics and reaction to failure, and a set of performance test procedures. LSF systems provide automatic car‑following at lower speeds to maintain a safe following distance in congested traffic and do not normally include full speed‑regulator control.

General information

• Status: Withdrawn (withdrawal stage recorded in ISO lifecycle).
• Publication date: 2009-04 (Edition 1, published March/April 2009).
• Publisher: International Organization for Standardization (ISO), developed by ISO/TC 204.
• ICS / categories: 43.040.15 (Car informatics; on‑board systems / ITS applications).
• Edition / version: Edition 1, 2009.
• Number of pages: 28 (ISO bibliographic record).

Scope

Defines functional and performance requirements and test methods for Low Speed Following (LSF) systems — driver assistance systems that automatically follow a target vehicle at low speeds in congested traffic to reduce repetitive accelerator/brake inputs. The scope excludes environments where frequent interruptions by pedestrians or cyclists are expected and does not treat full speed‑regulator or complex highway automation outside the LSF operational domain.

Key topics and requirements

• Basic control strategy for LSF (car‑following logic and speed/spacing behaviour).
• Minimum functional requirements (activation, deactivation, takeover, safe limits).
• Driver‑interface elements and human‑machine interaction requirements.
• Diagnostics, fault detection and required reaction to failures (safe fallback behaviour).
• Performance test procedures and acceptance criteria for system behaviour in representative low‑speed traffic scenarios.

Typical use and users

Intended for vehicle manufacturers (OEMs), ADAS/ITS suppliers, test laboratories, regulatory bodies and conformity assessors developing, integrating or verifying low‑speed car‑following functions and traffic‑jam assistants. It is used to specify system behaviour, design human‑machine interfaces, and design performance validation tests.

Related standards

Relevant companion or successor documents include standards for Adaptive Cruise Control (ACC) and broader automated driving taxonomies and regulations — notably ISO 15622 (performance requirements and test procedures for ACC systems), UN‑ECE Regulation No. 157 (Automated Lane Keeping Systems / ALKS — traffic‑jam and low‑speed automated driving rules), and SAE J3016 (taxonomy and levels of driving automation). These documents are commonly referenced alongside ISO 22178 in ITS and vehicle automation development.

Keywords

Low Speed Following; LSF; intelligent transport systems; car‑following; traffic‑jam assistant; performance requirements; test procedures; driver assistance; ISO/TC 204; adaptive cruise.

FAQ

Q: What is this standard?

A: ISO 22178:2009 is an ISO international standard that specifies performance requirements and test procedures for Low Speed Following (LSF) systems — vehicle driver‑assistance systems that automatically follow a lead vehicle at low speeds in congested traffic.

Q: What does it cover?

A: It covers the basic control strategy, minimum functional features, driver‑interface elements, diagnostic and failure‑reaction requirements, and performance test methods for LSF systems operating in low‑speed congested traffic (not intended for areas with frequent pedestrians/bicyclists or for full speed‑range cruise control).

Q: Who typically uses it?

A: Vehicle OEMs, ADAS/ITS component suppliers, test houses, regulators and standards committees use it to design, validate and assess low‑speed car‑following systems.

Q: Is it current or superseded?

A: ISO 22178:2009 has been withdrawn (withdrawal stage recorded in ISO lifecycle; withdrawal ballot and stage entries are shown on the ISO record). Consult ISO and national bodies for replacement or applicable successor documents and for harmonized regulations (for example, ACC and ALKS provisions).

Q: Is it part of a series?

A: It sits in the family of Intelligent Transport Systems (ISO/TC 204) deliverables and is commonly considered alongside adaptive cruise control standards (ISO 15622) and other ITS/automation standards and regulations (for example UNECE R157 and SAE J3016) when addressing longitudinal automated driving and low‑speed automation.

Q: What are the key keywords?

A: Low Speed Following, LSF, car‑following, traffic‑jam assistant, adaptive cruise, ITS, driver assistance, performance test procedures.