What is the type of tactile block installed on on-street platform edges?

The type of tactile block installed on on-street platform edges is known as a lozenge. Lozenge tactile blocks are specifically designed to alert visually impaired individuals to the edges of platforms, where there may be a drop-off or other hazards. Their unique shape helps provide a clear and recognizable surface texture that can be detected by a cane or through foot placement, guiding individuals safely and effectively.

The use of lozenge tactile blocks at platform edges enhances safety by serving as a tactile warning, prompting caution as pedestrians approach the edge. It is important that these blocks are distinct from other types of tactile surfaces, as their design is focused on creating an effective warning system that is intuitive for users who rely on tactile feedback for navigation.

Other options, while also relevant to tactile ground surface indicators, do not fulfill the specific role required at on-street platform edges. Utilizing the correct type of tactile block is crucial for ensuring compliance with accessibility standards and enhancing the safety of all users, particularly those with visual impairments.