Several Types of Tactile Paving Patterns - 翻译中...
Just like Braille, tactile paving allows visually impaired individuals to gather information about their surroundings through touch. Tactile paving conveys warnings and alerts, or may mark safe areas. It provides a practical way for individuals to identify their environment and navigate independently, providing support for pedestrians with visual impairments.
The attention pattern consists of truncated dome rows. There are two types of attention patterns: grid and offset patterns. The difference lies in how the truncated dome rows are arranged.
Grid pattern tactile paving
Tactile paving with a grid pattern has flat-topped truncated domes arranged in a square grid. This is one of the most common patterns for detectable warning surfaces on sidewalks in urban areas. They are typically used to indicate where the sidewalk transitions from the sidewalk to the curb at the end of a sidewalk.
Offset pattern tactile paving
In the offset pattern, truncated domes are located in alternating rows. While this may appear similar to a grid pattern at first glance, offset patterns convey different hazards. They signal the presence of large openings or cracks ahead to reduce the risk of pedestrians falling. Offset patterns are widely used on train platforms. A row of dome rows should run parallel to the end of the platform, about 20 inches from the platform edge.
The guidance pattern, also known as the corduroy pattern, consists of circular button or ribbed bars. These can run across a path or along a path, conveying two very different types of information.
Cross path guidance pattern tactile paving
When running across a path, these bars or lines indicate the presence of steps or tripping hazards ahead. They can be found at the top or bottom of stairs, or at the foot of a ramp to alert pedestrians to stop and be careful.
Stairway ahead guidance pattern tactile paving
When the guidance pattern runs perpendicular to the path, it signals the presence of steps or stairs ahead.
Along path guidance pattern tactile paving
When running along a path, the guidance pattern uses raised bars to indicate a safe route. By staying close and following the path, pedestrians can avoid obstacles and hazards.
The diamond pattern consists of uniformly spaced rows of diamond-shaped tiles with rounded edges. This type of tactile paving warns pedestrians that they are approaching fast-moving street-level transportation such as trams. They are installed at least 20 inches away from the edge of the track, giving pedestrians enough time to stop at a safe distance. The diamond pattern tactile paving warns pedestrians that they are approaching fast-moving street-level transportation.
Attention and guidance patterns are not the only features that help ground indicators promote inclusivity in public spaces. In addition to being tactile, detectable warning surfaces are also designed to use color contrast to stand out. Many visually impaired pedestrians benefit from warning surfaces that form a distinct contrast with the surrounding sidewalk. This can be achieved through the use of powder-coated or painted tiles or detectable warning surfaces made from naturally oxidising cast iron. As cast iron oxidises and is exposed to moisture, it forms a temporary layer of iron oxide flakes that further darken, forming what is known as permanent copper-green. Once formed on tactile paving, this color will remain consistent and offer effective visual contrast throughout its lifespan.