ISO 14401-2:2009

Overview

ISO 14401-2:2009 - Earth-moving machinery - Field of vision of surveillance and rear-view mirrors - Part 2: Performance criteria - specifies the performance criteria for surveillance and rear‑view mirrors fitted to ride-on earth‑moving machinery. The standard defines minimum fields of vision behind the machine to ensure adequate operator visibility during operation (forward/reverse) and while transporting on public roads. It aligns mirror testing with ISO 14401-1 and can be used together with ISO 5006 visibility requirements.

Key topics and requirements

• Field‑of‑vision classes (A, B, C, D):
  • Class A: operator must see a 10 m wide ground area centered on the machine from 30 m behind.
  • Class B: defined trapezoidal field starting 1 m behind at 1.5 m height (0.75 m width) expanding to 5 m width at ground 30 m behind.
  • Class C: similar to B but wider (1 m to 7.5 m).
  • Class D: specific to dumpers - visibility of outer tyre contact points (wheeled) or outermost track projections (crawler) within 100 mm.
• Mirror installation and position:
  • Mirrors shall minimize vibration effects and be visible through swept windscreen area or canopy openings.
  • Lateral projection limits: mirrors projecting >0.20 m and >2 m above ground should be foldable for road use.
  • If bottom of exterior mirror is <2 m above ground, projection must not exceed 0.3 m beyond machine width.
• Adjustment and retention:
  • Interior mirrors adjustable by the operator; exterior mirrors adjustable from operator position, ground, or attached platforms.
  • Adjusting mechanisms must retain position during operation; folding mirrors must return to prior adjustment.
• Alternatives and documentation:
  • CCTV systems may be used to meet fields of vision.
  • Operator instructions must include mirror positioning/use and advise verification after configuration changes.
• Applicability:
  • Machine families and minimum mirror class requirements are listed in Annex A (e.g., wheel loaders, dumpers, dozers).

Applications

• Designing and specifying mirror systems for new earth‑moving equipment.
• Verifying mirror performance during type approval, factory acceptance, or safety audits.
• Retrofits and selecting CCTV solutions to meet visibility requirements.
• Preparing operator manuals and training materials focused on reducing blind‑spot risks.
• Ensuring compliance with international standards and national road regulations for off‑highway and on‑road operation.

Who uses ISO 14401-2:2009

• OEM product designers and engineers
• Safety and compliance officers
• Test laboratories and certification bodies
• Fleet managers and equipment purchasers
• Regulators and standards committees

Related standards

• ISO 14401-1 (Test methods for mirrors)
• ISO 5006 (Operator's field of view - test method and performance criteria)
• ISO 6165, ISO 3411, ISO 6016 (machine classification, operator envelope, and mass measurement)

Keywords: ISO 14401-2:2009, earth-moving machinery, field of vision, surveillance mirrors, rear‑view mirrors, mirror performance criteria, operator visibility, CCTV for machinery.