Tactile Walking Surface Indicators in Canada
TWSI, also known as detectable warning surfaces or tactile attention indicators, are standardized walking surfaces that communicate information to individuals who are blind via texture and, in some cases, sound. Tactile walking surface indicators are designed to be visible when walking or using a long white cane. They are used to warn individuals who have poor or no eyesight of possible dangers such as moving motor traffic.
The indicators placed in the city of Toronto are constructed of cast iron; thus, they must have a strong tonal contrast with the surrounding surface. Now, let us acquire some information on tactile walking surface indicators in Canada.
Types of TWSI
Tactile Walking Surface Indicators (TWSI) are classified into two types:
1.Attention TWSIs - It is also known as warning TWSIs as it alerts workers for potential dangers as such at the start of the stairway or on the edge of the platform.
2.Guidance TWSIs - also known as wayfinding TWSIs, these TWSIs offer information regarding the direction of movement across open areas. They are intended to direct a person along a predetermined route of travel.
TWSIs should be colour contrasted with the walking surface around them. Safety yellow is the recommended colour for attention TWSIs. Using a bright colour on a dark ground surface or a dark colour on a light ground surface is also effective. More information may be found in the section Color and Brightness Contrast.
TWSIs should have bevelled edges, whether placed as pre-manufactured panels or surface-mounted into an existing ground or floor surface. The TWSI panels' base surface should be no more than three millimetres above the current surface. Surface-mounted installations are not desirable and should be used only when cast-in-place or recessed installations are not possible.
TWSIs should always be securely fastened to prevent edges from lifting.
Implementation of Tactile Walking Surface Indicators Consultation
To give consistent indications to those with poor or no vision, Toronto adheres to universal standards. Tactile walking surface indicators are utilized all around the world. The design adheres to both Canadian (CSA) and International (ISO) standards. Japan has been using them since 1967. The ISO standard was developed in 1999, and it has been extensively used in the United States since 2001.
The CSA standard was developed in 2004 and was last revised in 2012. In creating its accessibility guidelines, the Government of Ontario also engaged in extensive consultation with advisory organizations and representatives of different impairments.
Why are Tactile Walking Surface Indicators required?
As previously stated, the primary goal of warning tactile signs is to assist the visually impaired in reconsidering their path of travel before proceeding to verify that there are no potentially dangerous circumstances. Thus, these indicators are also known as "hazard tactile," Their design, which is constructed with a raised grid pattern of studs, would undoubtedly aid visually or partly handicapped people in detecting approaching dangers on their own.