Standards Development

Scope

This document describes the design requirements and recommendations for dynamic signs from the perspectives of visibility, safety, and accessibility, based on ISO 23456-1.

The design requirements and recommendations includes “How to Design,” “How to Display Moving Elements,” and “Where to Place” dynamic signs.

“How to Design” describes how to design a sign that ensures visibility. It also describes the legible display design requirements for people with special requirements such as low vision as well as the elderly. “

How to Display Moving Elements” describes the requirements for ensuring visibility and image-related safety, including VIMS and photosensitive seizures.

“Where to Place” describes the placement requirements for ensuring visibility and enabling users to safely move around the facility while looking at the signs. The sign placement requirements for people who have difficulty moving around the facility, including wheelchair users and people with low vision, are also described.

This standard applies to dynamic sign designers and layout planners.

This document applies to dynamic signs for pedestrians, not persons in vehicles. This document does not cover emergency signs for escape routes. 

Purpose

This standard is a part of the umbrella structure of the Dynamic Sign series developed in ISO/TC159/SC5

A dynamic sign is an information presentation technology that changes its position, size, brightness, and content. Furthermore, this change has the advantage of increasing attractiveness, identification, readability, and comprehensibility. Therefore, it is necessary to specify the design requirements to maintain these visibility aspects. On the other hand, the dynamic component of the image may cause undesirable biological effects, such as photosensitive seizures (PSS) due to flashing frequency, repetitive patterns, etc., visually induced motion sickness (VIMS) due to visual motion stimuli involving rotation or translation to a wider field of view. In addition, depending on the location of the sign, it may cause stagnation of human flow, reverse flow, interference, or confusion, which is not the intention of the installer.

Furthermore, dynamic signs are used in public facilities, which are visited by users with diverse sensory and physical characteristics (e.g. low vision, older people, wheelchair users, cognitive disability). It is necessary to consider how to present information to these users in a way that is easy to see and understand from the perspective of accessible design.

ISO 23456-1 Part 1: Genral published previously described items to be considered for dynamic signs but not specified requirements and recommendations in detail. Hence this standard describes the requirements and recommendations to maintain the visibility of dynamic signs and to eliminate the negative effects of dynamic signs described above, and accessibility. Since there is no existing standard that can be immediately referred to for installation location, information that can be used as a reference is described based on a literature survey from the viewpoint of ergonomics. The accessibility requirements were written on the basis of new experimental data, with reference to previously published standards for visual signs. It also describes the considerations for dynamic signs identified by interviews with people with visual, hearing, physical and cognitive disabilities, as well as with older people.

By clarifying the requirements and recommendations for ergonomic considerations, this standard can contribute to the successful development of new technologies. 

Since this standard summarizes visibility, safety and accessibility considerations for information presented in dynamic signs and used in a physical environment, it is appropriate to develop it as a new proposal in ISO/TC 159/SC 5/WG 7, which has been working on standardization related to these issues. Sustaina