A city in South Korea has designed new technology that alerts distracted smartphone users they are approaching traffic. CNN's Michael Holmes has the details.
원문출처 : https://www.cnn.com/videos/tech/2019/03/20/distracted-cell-phones-users-crosswalk-south-korea-high-tech-solution-holmes-pkg-vpx.cnn
원문출처 : https://www.cnn.com/videos/tech/2019/03/20/distracted-cell-phones-users-crosswalk-south-korea-high-tech-solution-holmes-pkg-vpx.cnn