606.03 DEFINITIONS The following definitions shall apply: Back edge (of warning indicator) - This refers to the edge of the area of warning indicators furthest from the crossing point or hazard. Composite discrete Tactile Ground Surface Indicators (composite discrete TGSIs) Tactile ground surface indicators – that are individually installed and which provide a differing luminance for the sloping sides and upper surface of the truncated cone Cue Any object within the environment which can be felt, heard, – seen or smelt by a blind or vision impaired pedestrian Depth Measured along the direction of travel when encountering – the TGSI Directional Indicators A directional indicator is a textured surface – feature consisting of directional grooves built into or applied to walking surfaces to give directional orientation to blind and vision impaired people. Direction of Travel The path a person travels along which may – be a footpath, passageway, walkway, ramp, stairs, landing or similar. Discrete Tactile Ground Surface Indicators (discrete TGISs) – Tactile ground surface indicators that are individually installed, which provide the same luminance for the sloping sides and upper surface of the truncated cone. Front edge (of warning indicator) This refers to the edge of the – area of warning indicators closest to the roadway. Height Distance measured above the finished floor or ground – surface Integrated Tactile Ground Surface Indicators (integrated TGSIs) Tactile ground surface indicators that are in a defined pattern and – which are of the same luminance and material as the base surface. Luminance contrast - The light reflected from one surface or component, compared to the light reflected from another surface of component. Luminance factor - The ratio of luminance of a surface to that of a perfect reflector, identically illuminated Luminance reflectance value LRV – Orientation Orientation is a of where they – person’s awareness are in relation to their environment.
606.03 DEFINITIONS The following definitions shall apply: Back edge (of warning indicator) - This refers to the edge of the area of warning indicators furthest from the crossing point or hazard. Composite discrete Tactile Ground Surface Indicators (composite discrete TGSIs) – Tactile ground surface indicators that are individually installed and which provide a differing luminance for the sloping sides and upper surface of the truncated cone Cue – Any object within the environment which can be felt, heard, seen or smelt by a blind or vision impaired pedestrian Depth – Measured along the direction of travel when encountering the TGSI Directional Indicators – A directional indicator is a textured surface feature consisting of directional grooves built into or applied to walking surfaces to give directional orientation to blind and vision impaired people. Direction of Travel – The path a person travels along which may be a footpath, passageway, walkway, ramp, stairs, landing or similar. Discrete Tactile Ground Surface Indicators (discrete TGISs) – Tactile ground surface indicators that are individually installed, which provide the same luminance for the sloping sides and upper surface of the truncated cone. Front edge (of warning indicator) – This refers to the edge of the area of warning indicators closest to the roadway. Height – Distance measured above the finished floor or ground surface Integrated Tactile Ground Surface Indicators (integrated TGSIs) – Tactile ground surface indicators that are in a defined pattern and which are of the same luminance and material as the base surface. Luminance contrast - The light reflected from one surface or component, compared to the light reflected from another surface of component. Luminance factor - The ratio of luminance of a surface to that of a perfect reflector, identically illuminated LRV – Luminance reflectance value Orientation – Orientation is a person’s awareness of where they are in relation to their environment.