An app designed to help visually impaired or blind pedestrians use public transit debuted at a Washington subway station in May. Waymap aims to expand travel options for blind and visually impaired people with step-by-step audio directions that it says are accurate up to 3 feet (0.9 meter) throughout a trip. The app does not use GPS and can operate regardless of cellphone signal strength indoors or outdoors. It loads detailed mapping data onto a smartphone and uses motion sensors on the phone to offer precise directions.
