CAN-ASC-2.4 – Wayfinding and Signage
11. Wayfinding
Information
Table of contents
11.1 General
Wayfinding is facilitated by well-designed indoor and outdoor environments that incorporate clear paths of travel, along with constructed and natural navigation cues such as edges, landmarks, signage, surface textures, lighting, and acoustics that can be detected through visual, tactile, and auditory means.
Wayfinding systems, including those used to identify landmarks and decision points, should present information that is easy to locate, read, and understand. Effective wayfinding enables individuals to:
- understand the site conditions they may encounter;
- know their position relative to other key locations;
- orient themselves in an appropriate and safe direction; and
- discover new destinations and services independently.
Wayfinding shall:
- support orientation through variations in acoustics, surface textures, lighting, and colour following the principle of multi-sensory accessibility, ensuring they are available in formats suitable for individuals with sensory impairments;
- provide supportive measures in combinations, i.e., audible and tactile; audible and visual;
- be supported through tactile direction indicators (TWSIs) in combination with audible, tactile and visual cues in large or highly complex buildings and extensive areas;
- indicate changes in direction when TWSIs are used in large or highly complex buildings and extensive areas;
- have detectable paths of travel with visual contrast against adjacent walls to facilitate navigation in large or highly complex buildings and extensive areas; and
- have paths of travel maintain a minimum luminance contrast with the surrounding environment, as outlined in Clause 10.2, in large or highly complex buildings and extensive areas.
Note 1: Wayfinding systems complement but do not replace the need for accessible customer service.
Note 2: Consider ambient noise levels, placement options, and identification of tactile information to assess whether visual information should be supported by audible and tactile elements.
Note 3: For ease of navigation and to help facilitate wayfinding have paths of travel that intersect at perpendicular angles whenever possible.
11.2 Obstacles
Decorative objects, trees, planters and other items are often placed along paths of travel. While it is important to beautify the environment to create an atmosphere, the information below will be helpful for establishing ways to achieve what is needed without endangering others.
11.2.1 Obstacles on paths of travel
Paths of travel shall:
- comply with CSA/ASC B651:23;
- not have wayfinding or signage elements obstruct the path of travel in accordance with CSA/ASC B651:23;
- have visually contrasting markings to highlight the presence of transparent obstacles, such as glass walls or panels; and
- have maintenance plans with provisions for the clearing and repair of all wayfinding and signage elements that are part of the space.
Note: Where protruding objects cannot be removed, they should be placed outside paths of travel or recessed so as not to reduce the width required for unobstructed passage for all persons.
11.2.2 Bollards in paths of travel
Bollards in paths of travel shall:
- be placed in accordance with CSA/ASC B651:23;
- have a height between 500 mm and 1200 mm to facilitate detection by pedestrians and motorists;
- have visual contrast markings in an upper position to be easily detected;
- avoid being placed in a triangular or U-shape arrangement as they present a barrier for wheeled mobility devices; and
- have a form of ground level detection, plinth or tapping rail when they are wider at the top than at ground level to allow detection.
Note 1: Bollards should have a consistent profile throughout their height from ground level.
Note 2: Where possible, bollards should not be linked with ropes or chains as this presents a hazard to pedestrians.
Note 3: Flexible bollards that can withstand low-speed vehicular impact and return to their original position may be considered near pedestrian crossings to enhance visibility and protect pedestrian zones, where fixed bollards are not feasible.
11.3 Walking surfaces of interior and exterior paths of travel
Interior paths of travel are used to navigate indoor environments in buildings, and large complexes. Exterior paths of travel are used to navigate pathways outside of a building.
Walking surfaces of interior and exterior paths of travel in the built environment shall:
- be firm, stable, slip resistant, and free of glare;
- avoid the use of busy patterns that can result in visual confusion and disorientation;
- use consistent floor surface texture to identify the same type of hazard; and
- support orientation and wayfinding at critical navigation points through additional illumination, increased visual contrast, and tactile elements, such as material changes (textural changes) or TWSI.
Note 1: Textural changes may be used to indicate non-hazardous features such as seating areas where TWSIs are not required. Textural changes can complement, but should not replace TWSIs where safety or accessibility compliance is required.
Note 2: In large open outdoor and indoor areas, different textured surfaces should differentiate paths of travel from adjacent areas.
11.3.1 Additional specifications for exterior paths of travel
Exterior paths of travel shall:
- for paved surfaces:
- have pedestrian and cycling zones that are physically separated and cane-detectable;
- have a continuous clear visual and tactile detectable delineation between pedestrian and cycling zones, such as a 300 mm grass section for easy detection, or be on different levels such as the street and the sidewalk;
- incorporate distinctive surface materials, such as tiles, at intersections or key decision points in outdoor plazas to help users identify critical areas and make informed navigation choices;
- be simple and not interfere with orientation or safe street crossings when used in decorative crosswalks, including elements such as colour, design, imagery, texture, or material that enhance aesthetics beyond standard crosswalk treatments; and
- include two white transverse lines bordering the crosswalk (for all crosswalks).
- for paved and unpaved surfaces:
- include identification of the location and nature of the path(s) to the building at the entrance(s) to the site, from any parking space, and at decision points (intersections) within the site;
- provide a dedicated pedestrian pathway that is visually and tactilely separated from other modes of transportation, such as scooters and bicycles;
- use contrasting colours for pathway edges against the surrounding landscape to support wayfinding (e.g., a light-coloured path against darker greenery allows individuals to better differentiate the route and follow it more easily);
- feature high-contrast railings along pathways or near stairs to enhance visibility; and
- connect accessible parking spaces and drop-off zones that are connected to the accessible entrance.
Note 1: Avoid shared infrastructures, including cycling paths between access points to buses and public transportation, as they are not considered accessible.
Note 2: Architectural elements may be included to help maintain visibility of wayfinding and signage elements during different seasons.
Note 3: Decorative crosswalks should be avoided across roadways that have high volumes of traffic or a high percentage of truck traffic, or both, specifically, major and minor arterial roadways.
Note 4: Unpaved paths of travel should be separated from faster moving vehicles (e.g., scooters, bicycles, e-bikes, electric cars) to enhance the safety of people of all abilities.
11.4 Tactile Walking Surface Indicator (TWSI)
Note: This Standard uses the terminology “attention indicator” and “direction indicator” to align with other National Standards of Canada. International Standards may use different terminology such as “attention pattern” and “direction pattern.”
11.4.1 Design according to function
11.4.1.1 General requirements
TWSIs shall:
- be placed in areas lacking constructed or natural navigation cues;
- be arranged in a clear and structured sequence, with defined start and end points, marking intersections, decision points, or potential hazards along the way;
- be of enough depth in the direction of travel to provide adequate detectability and appropriate response by the users, such as stopping and turning;
- have their starting point well-defined and easily identifiable, aligning with constructed and natural navigation cues; and
- have a smooth adjacent walking surface of at least 600 mm wide.
Note 1: TWSIs are not to be used to compensate for inadequate design.
Note 2: TWSIs can additionally be installed independently to mark hazards or specific locations for individuals to navigate from one destination to another safely.
Note 3: TWSIs can be used to accommodate a range of accessibility requirements and support safe and independent navigation. TWSIs also allow users to orient themselves effectively at intersections and directional crosswalks.
Note 4: Smooth adjacent surfaces make TWSIs easier to detect and distinguish by foot or cane. To reduce confusion, paving joints or gaps should be minimized. Where unavoidable, such gaps should be limited in coverage and kept narrow and shallow to prevent interference with tactile cues.
11.4.1.2 TWSI detection
TWSIs shall:
- ensure detectability underfoot and with a long white cane;
- ensure clear differentiation between direction and attention indicators for individuals who rely on them for navigation;
- be placed adjacent to or surrounded by smooth surfaces to support effective detection; and
- feature a slip-resistant surface (see Annex A).
Note 1: Different slip resistances between the TWSI and adjacent surfaces should be avoided.
Note 2: A consistent pattern should be maintained for each type of TWSI in order to prevent confusion.
Note 3: The slip resistance of TWSIs should also respect the criteria presented for slip resistance of other surfaces in CAN-ASC-2.3 (draft).
11.4.2 Attention indicator surfaces
11.4.2.1 General
Attention indicators provide critical safety information to everyone at potentially dangerous locations. They may be used to indicate pedestrian crossings, curbs, railway platforms, stairways, ramps, escalators, moving walkways, and elevators to enhance safety and awareness.
Attention indicators shall:
- only be used to identify potential hazards or provide guidance at intersecting points in a path;
- be standard within a building, facility, site, or complex of buildings;
- be clearly differentiated from direction indicators; and
- extend across the full width of a path of travel and perpendicular to the direction of travel when approaching a hazard.
Note 1: It’s important to provide consistent safety information so that people will recognize potentially dangerous situations in any location.
Note 2: In outdoor environments, cast iron is a durable material which doesn’t create glare and provides contrast.
Note 3: In indoor environments, the use of carpet, changes in flooring or the use of different materials at intersecting corridors provides useful wayfinding information.
11.4.2.2 Location
Except when the location is protected by a guard complying with clause 6.16.4 of CAN-ASC-2.1 (draft), an attention indicator shall be at the following locations:
Stairs and ramps:
- at the tops of stairs and ramps;
- at landings where there is a door leading onto the landing; and
- at landings longer than 2,100 mm where there are no continuous handrails.
Note: When installed at the bottom of a ramp ensure that a proper setback is used so that wheeled mobility device users are not destabilized at the bottom of the ramp but detection of the ramp is still possible for other users requiring the warning.
- In outdoor spaces:
- be continuous across the width of the stair with a maximum gap of 75 mm to the end of the tread;
- have a depth between 600 mm and 650 mm, starting one tread depth from the edge of the stair; and
- be provided at:
- each intermediate landing that has an entrance into a stair system;
- where the regular stairway pattern is broken; and
- where the run of the landing is greater than 2100 mm in length and does not have a continuous handrail.
- Paved and unprotected drop-off edge where:
- the change in elevation is greater than 250 mm; or
- the slope is steeper than in a ratio of 1:3 (33%).
- Both sides of ground-level railway crossings.
- Exposed perimeters of reflecting pools and fountains.
- Curb ramps and depressed curbs.
- Access points to a vehicular pathway or zone where no curbs or physical barriers distinguish paths of travel from vehicle travel areas.
- Where there is a hazard.
- Where there is a change in direction within a tactile guidance path using direction indicators.
- Where an amenity is present along a tactile path to aid in identification.
Note: At changes in direction within direction indicators, attention indicators should be configured in a square pattern centered on the direction indicators, with each side of the square being 600 – 650 mm.
11.4.2.3 Placement
Attention indicators shall:
- span the entire width of the hazard, covering all approach directions when signalling a hazard, and be positioned at least 300 mm away from the hazard;
- be positioned 300 mm from the sidewalk edge when indicating a pedestrian crossing;
- be installed at a 90° angle to the travel direction while extending across the full width of the crossing;
- be positioned 300 mm away from the curb edge when used to mark at-grade curbs separating sidewalks from vehicle lanes;
- be placed at the top landing in buildings where a staircase is located in an open space; and
- be arranged to ensure clear visibility of the first and last steps when used at stair landings to avoid any visual confusion.
Note: To reduce the likelihood of tripping or stumbling, stair flights and landings made of different materials should have similar frictional properties.
11.4.2.4 Luminance contrast
Luminance contrast for attention indicator surfaces shall:
- have a difference in light reflectance or CIE Y-value with their immediate surrounding surface, greater than 30 points for integrated units and greater than 40 points for discrete units, with a minimum reflectance value of the lighter surface of 50 points; and
- be achieved between the attention indicators and the surrounding area. If the required contrast cannot be attained, a continuous band of at least 100 mm wide with suitable contrast shall be placed adjacent to the attention indicators.
Note 1: Integrated units are single components that consist of domes, cones, or elongated bars formed together on a base surface or plate.
Note 2: Discrete units are independently installed tactile elements, such as domes, cones, or elongated bars, that are incorporated into ground or flooring surfaces as separate components.
Note 3: The effective area of the attention indicators should have a high visual contrast (see also Clause 10.1, 10.2 and 10.3) with the immediate surrounding pedestrian surface in both wet and dry conditions.
11.4.2.5 Configuration
Configuration of attention indicators is important to ensure their effectiveness when in use.
11.4.2.5.1 Arrangements of a single plate
Attention indicators design shall:
- have truncated domes or cones positioned in a square grid pattern, either aligned parallel or set at a 45° angle to the primary direction of travel; and
- have edges bevelled or level with the surrounding surface (e.g., height of 3 mm or less) to avoid tripping.
Note: The diagonal configuration tends to be easier to detect for cane users.
11.4.2.5.2 Dome height
Truncated domes or cones shall have a height ranging between 4 to 5 mm.
Note: Truncated domes or cones are more noticeable when adjacent to smooth surfaces like rubber, plastic or metal rather than rougher materials such as manufactured paving stones or textured concrete.
11.4.2.5.3 Dome diameter
Truncated domes or cones shall:
- have a top diameter between 12 mm and 25 mm, as indicated in Table 3;
- have the bottom diameter 9 mm to 11 mm larger than the top diameter; and
- have an allowable variation in the top diameter that does not exceed ±1 mm.
Note: A 12 mm top diameter is considered the most effective size for individuals to detect and differentiate through the soles of their shoes.
Table 3 — Dome diameter and spacing combinations
(See Clauses 11.4.2.5.3 and 11.4.2.5.4)
This table provides the top diameter, base diameter, and spacing requirements for flat-topped domes or cones.
| Top diameter of flat-topped domes or cones (mm) | Base diameter of flat-topped domes or cones (mm) | Spacing between the centres of adjacent domes or cones (mm) |
|---|---|---|
| 12 | 21 to 23 | 42 to 61 |
| 15 | 24 to 26 | 45 to 63 |
| 18 | 27 to 29 | 48 to 65 |
| 20 | 29 to 31 | 50 to 68 |
| 25 | 34 to 36 | 55 to 70 |
11.4.2.5.4 Dome spacing
Dome spacing shall have a minimum distance between the centre points of two neighbouring truncated domes or cones, whether aligned parallel or at a 45° diagonal angle to the travel direction, in accordance with the ranges specified in Table 3.
11.4.2.5.5 Dimensions of attention indicators
This Clause does not apply to railway platforms, where national laws, regulations, and standards take precedence.
Attention indicators shall:
- be installed cross the full width of the hazard when used as hazard indicators;
- have a depth between 600 mm and 650 mm, with one side aligned to the edge of the hazard; and
- have an increased depth to enhance detectability and allow for a longer stopping distance when no set-back is present.
11.4.3 Direction indicator surfaces
Before installing direction indicators, input from users should be obtained, and user testing should be completed. Consistency is paramount when installing these features. Direction indicator surfaces may be placed at transportation terminals and stations, as well as open spaces such as plazas or public spaces.
11.4.3.1 General
In large or open spaces, a tactile pathway or guiding line for navigation is required.
Direction indicators shall:
- be used to indicate directional orientation especially where no other clues in the built environment indicate the path to follow; and
- not rely on natural guiding patterns in areas where hazardous situations, such as driveways or vehicle entrances, are present.
Note 1: Direction indicators are recommended for safety and guidance in outdoor environments.
Note 2: The designated route should connect the entrance with all key locations throughout the premises, including but not limited to service desks, elevators, stairs, and escalators.
Note 3: An overuse of tactile direction indicator paths may lead to confusion. In a confined area, such as a lobby or transit facility, one or two paths should be sufficient.
Note 4: Some existing elements of the built or natural environment provide wayfinding clues so that Direction Indicator Surfaces may not be required. Examples include:
- a wall adjacent to the sidewalk if it goes straight and there are no obstacles or other hazards;
- a small wall, hedge, or curb (i.e., there are no acoustic cues and these elements may be detected only with a long white cane);
- a covered walkway which provides acoustic wayfinding cues; and
- corridors up to 3 m wide inside a building that are free of obstacles and provide acoustic cues. However, if the corridor includes rooms or offices open to the public, a tactile path and braille/tactile signage are essential.
11.4.3.2 Luminance contrast
Direction indicators shall:
- have a luminance-contrast of at least 50 % with the surrounding surface;
- have an adjoining continuous luminance contrast band at least 100 mm wide installed adjacent to it when the required contrast is not achievable; and
- not be yellow.
Note: Direction indicators are not yellow to differentiate from attention indicators.
11.4.3.3 Configuration
11.4.3.3.1 Arrangements
A direction indicator shall be constructed of parallel flat-topped elongated bars with a maximum end-to-end spacing of 30 mm that extend in the direction of travel.
11.4.3.3.2 Height of bars
Flat-topped elongated bars shall have a height between 4 mm and 5 mm.
Note 1: In indoor settings with highly smooth surfaces, a height of at least 4 mm is recommended.
Note 2: Flat-topped elongated bars are more easily detectable when placed adjacent to extremely smooth surfaces, such as plastic, metal, or rubber, compared to rougher materials like textured concrete or manufactured paving stones.
Note 3: Excessive height beyond the required level for effective detectability may increase the risk of tripping.
11.4.3.3.3 Length of bars
Flat-topped elongated bars shall:
- have a top length of more than 270 mm with the bottom length extending an additional 9 mm to 11 mm beyond the top; and
- have a drainage gap between 10 mm and 30 mm to allow proper water flow if there is risk for water build up between them.
11.4.3.3.4 Bar width
Flat-topped elongated bars shall:
- have their top width range between 17 mm and 30 mm as detailed in Table 4; and
- have their bottom width 9 mm to 11 mm larger than the top width.
Note: A 17 mm top width is considered the most effective dimension for individuals to detect and differentiate using the soles of their shoes.
Table 4 — Flat-topped elongated bar width and spacing combinations
(See Clauses 11.4.3.3.4 and 11.4.3.3.5)
This table provides the top width, base width, and spacing requirements for flat-topped elongated bars.
| Top diameter of flat-topped domes or cones (mm) | Base diameter of flat-topped domes or cones (mm) | Spacing between the centres of adjacent domes or cones (mm) |
|---|---|---|
| 17 | 26 to 28 | 57 to 78 |
| 20 | 29 to 31 | 60 to 80 |
| 25 | 34 to 36 | 65 to 83 |
| 30 | 39 to 41 | 70 to 85 |
11.4.3.3.5 Bar spacing
Bar spacing is the measured distance between the centrelines of adjacent flat-topped, elongated bars.
The bar spacing shall:
- correspond to the top width, as specified in Table 4; and
- have a top width tolerance of ±1 mm.
11.4.3.3.6 Width of pattern
The width of a direction indicator shall:
- be between 250 and 300 mm when installed to a defined route; and
- if installed across a path of travel as an indicator of a facility or changing diverging route:
- be between 600 and 650 mm; and
- have the elongated bars running in the direction toward the facility or changing route.