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Assistive products for persons with vision impairments and persons with vision and hearing impairments. Acoustic and tactile signals for pedestrian traffic lights Ingestion-build-82061 This part of IEC 614391 Scope This International Standard specifies requirements for acoustic and tactile signals for pedestrian traffic lights to assist in safe and independent mobility of persons with vision impairments and persons with vision and hearing impairments. It is applicable to design, installation and operation of acoustic and tactile signals for pedestrian traffic lights. It is not applicable to electromagnetic compatibility (EMC), electrical safety or