ISO 11684:2023

Overview

ISO 11684:2023 - Tractors, machinery for agriculture and forestry, powered lawn and garden equipment - Safety labels - General principles - defines the general principles for designing safety labels and hazard pictorials permanently affixed to, or displayed electronically on, agricultural and forestry tractors, machinery, and powered lawn and garden equipment. The second edition (2023) updates terminology (sign → label), harmonizes graphical communication, and provides guidance on label formats, colours, pictorials, signal words and operator’s manual information to support global safety and regulatory compliance.

Key topics and technical requirements

• Scope and objectives: Establishes label objectives to alert users to hazards, describe consequences and instruct on avoidance.
• Label formats: Specifies two-panel and three-panel layouts, and variants for labels with text and without text (no‑text safety labels).
• Signal words: Defines signal word panels and meanings - CAUTION, WARNING, DANGER - to indicate severity levels of hazards.
• Pictorials and graphics: Guidance for hazard description and hazard avoidance pictorials, including use of safety alert triangles, prohibition symbols and STOP instructions, plus principles for graphic design.
• Colours and materials: Includes colour specifications and photometric/material properties (normative annex) for consistent safety colours and borders.
• Lettering and languages: Requirements for letter style, size, translations and multi‑language labels to ensure legibility and international use.
• Location and life expectancy: Guidance on label placement, expected life, and effective use on machines.
• Electronic safety signs: Principles for electronic display, acknowledgement, priority and timing of electronic safety messages.
• Operator’s manual integration: Information that should accompany labels in the operator’s manual.

Practical applications - who uses ISO 11684:2023

• Manufacturers of tractors, agricultural and forestry machinery, and powered lawn/garden equipment designing machine-mounted safety labels.
• Product designers and safety engineers creating hazard pictorials and label layouts that meet international best practice.
• Technical writers and compliance officers preparing operator’s manuals and ensuring label/manual consistency.
• Regulatory bodies and certification bodies assessing conformity to international safety communication requirements.
• Training organizations and fleet operators using standardized labels to improve operator awareness and safety programs.

Benefits include improved hazard communication, reduced reliance on language, harmonized international labeling, and clearer operator instructions.

Related standards

• ISO 3864‑2 - Graphical symbols: Design principles for product safety labels
• ISO 3864‑4 - Colorimetric and photometric properties of safety sign materials
• ISO 3600 - Operator’s manuals: Content and format
• ISO 11783‑6 - Virtual terminal (serial control & communications for tractors/machinery)

Keywords: ISO 11684:2023, safety labels, hazard pictorials, tractors, agricultural machinery, powered lawn and garden equipment, signal words, safety colours, operator’s manual.