Suitability Evaluation of Visual Indicators on Glass Walls and Doors for Visually Impaired People

Abstract:

This contribution focuses on the marking of glass with high contrasting indicators in view of the special requirements of people with visual impairment. Such people may have difficulties in identification of glass surfaces as obstacles. This can lead to accidents and injuries. This circumstance can be alleviated by applying appropriate visual indicators on glass surfaces that would be otherwise difficult to detect. Toward this end, guidelines and regulations exist in respective standards for barrier-free construction. However, designers appear to be reluctant in implementing such measures. Moreover, the range of preferences and options with regard to the design and positioning of such markers are not fully understood. This circumstance motivated the research presented in this paper. In an original experimental set-up, people with impaired vision evaluated various design solutions for such visual indicators, regarding their visibility and perceptibility. Thereby, the following aspects of the indicators were investigated: design of signs (uninterrupted versus interrupted, arrangement, color), vertical placement, and opening signage. The results (both objective measurements of visibility and subjective feedback from the participants) facilitate the identification of preferable design solutions for visual indicators. As such, they are not only valuable toward accommodation of the special requirements of sight impaired persons, but can also support fully sighted people in inauspicious situations (e.g. under sub-optimal lighting situations, stress or distraction).

• Periodical: Applied Mechanics and Materials (Volume 887)
• Pages: 519-526
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.887.519
• Online since: January 2019
• Authors: Magdalena Maringer*, Nico Hauck, Ardeshir Mahdavi
• Keywords: Design for All, Luminance Contrast, Universal Design, Visual Impairment, Visual Indicators on Glass

References

[1] World Health Organization (2012). Global data on visual impairments. World Health Organization, Geneva.

[2] Austrian Standards Institute (2017). ÖNORM B 1600:2017, Barrierefreies Bauen – Planungsgrundlagen (Accessible built environment – Design principles). Austrian Standards Institute, Vienna.

[3] Austrian Standards Institute (2017). ÖNORM EN 16584-1:2017, Bahnanwendungen – Gestaltung für die Nutzung durch PRM – Allgemeine Anforderungen – Teil 1: Kontrast (Railway applications – Design for PRM use – General requirements – Part 1: Contrast). Austrian Standards Institute, Vienna.

DOI: 10.31030/2429899

[4] International Organization for Standardization (2011). ISO 21542:2011, Building construction – Accessibility and usability of the built environment. International Standardisation Organization, Geneva.

[5] Deutsches Normungsinstitut (2009). DIN 32975:2009, Gestaltung visueller Informationen im öffentlichen Raum zur barrierefreiein Nutzung (Designing visual information in the public area for accessible use). Deutsches Institut für Normung, Berlin.

DOI: 10.31030/1552945

[6] International Organization for Standardization (2011). ISO 21542:2011, Building construction – Accessibility and usability of the built environment. International Standardisation Organization, Geneva.

[7] Schweizerischer Ingenieur- und Architektenverein (2009). SIA 500:2009, Hindernisfreie Bauten (Obstacle free buildings). Schweizerischer Ingenieur- und Architektenverein, Zürich.

[8] British Standards (2010). BS 8493:2008+A1:2010, Light reflectance value (LRV) of a surface – Method of test. British Standards Institute, London.

[9] International Commission on Illumination (2004). CIE 15:2004, Colorimetry. 3rd edition, CIE Central Bureau, Vienna.

[10] Republik Österreich (1993). Bundespflegegeldgesetz (national law on nursing allowance). BGBl. Nr. 110/1993, Information on https://www.ris.bka.gv.at/GeltendeFassung.wxe?Abfrage= Bundesnormen&Gesetzesnummer=10008859, last visited: 2017-05-01.