Guidance on the 2010 ADA Standards for Accessible Design

Text Telephones (TTY). Section 4.1.3(17) of the 1991 Standards requires a public TTY to be provided if there are four or more public pay telephones at a site and at least one is in an interior location. Section 217.4.2 of the 2010 Standards requires that a building or facility provide a public TTY on each floor that has four or more public telephones, and in each telephone bank that has four or more telephones. Additionally, section 217.4.4 of the 2010 Standards requires that at least one public TTY be installed where four or more public pay telephones are provided on an exterior site. Section 217.4.5 of the 2010 Standards also requires that a public TTY be provided where at least one public pay telephone is provided at a public rest stop, emergency roadside stop, or service plaza. Section 217.4.6 of the 2010 Standards also requires that a public TTY be provided at each location where at least one public pay telephone is provided serving a hospital emergency room, a hospital recovery room, or a hospital waiting room. Section 217.4.7 of the 2010 Standards also requires that, in addition to the requirements for a public TTY to be provided at each location where at least four or more public pay telephones are provided at a bank of pay telephones and where at least one public pay telephone is provided on a floor or in a public building, where at least one public pay telephone serves a particular entrance to a bus or rail facility at least one public TTY must serve that entrance. In airports, in addition to the requirements for the provision of a public TTY at phone banks, on floors, and in public buildings with pay phones, where four or more public pay phones are located in a terminal outside the security areas, in a concourse within the security areas, or a baggage claim area in a terminal at least one public TTY must be provided. Section 217.4.8 of the 2010 Standards also requires that a TTY be provided in at least one secured area where at least one pay telephone is provided in a secured area used only by detainees or inmates and security personnel in detention and correctional facilities.