Today, for South Korea's National Day for People with Disabilities, Seoul Metro has unveiled an update for its mobile app to make it more useful to people with seeing and hearing impairments.
The app will alert passengers when their train arrives through an audio or text alert, and it will also guide them to the nearest exit and restrooms.
The updates will be available by June.
Seoul Metro will also install more elevators so that they're at every station.
In 2015, 87 percent of subway stations in Seoul had elevators but now that's over 92 percent.
Some stations are also providing video phones for people who use sign language.