Jay Jung, 18, grew up with his grandparents in South Korea. Walking around Seoul with them as an elementary schooler, he noticed they often couldn't keep up with the pedestrian crossing signals, struggling to cross the street in time before cars came whooshing by.
"Whenever I would go with them to the local grocery store or the local park, I would realize that we were not even halfway and then the light just suddenly turns red," Jung said.




