Disability Access Consultants


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TGSI’s 101 – The FACTS!


  • Tactile Ground Surface Indicators are covered by the Australian/New Zealand Standard 1428.4.1:2009 and is described as a means to assist individuals with a visual impairment.
  • Hazard Tactile Ground Surface Indicator’s must be installed where a potential injury risk or hazard – for instance this includes, however is not limited to: a roadway, a stairway, escalators, railway platforms, bus stops, etc. – are located.
  • Directional TGSI’s must be installed where a change of direction is located for EXAMPLE: bus stops, traffic islands, railway platforms, etc.
  • TGSI’s must have a MINIMUM Luminance Contrast . reading of 30% measured against adjacent surfaces.
  • Tactile Ground Surface Indicators must be 4mm – 5mm in height to allow clear identification for and by individuals with visual impairments.
  • When TGSI’s are installed they must be installed in a manor that spans the full width of the path of travel.
  • TGSI’s also require: to be detectable by tactile means; to be lain in such a way that there is no likelihood of the edges lifting; to be slip resistant

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