Seoul uses citizens' late night calls to plan new night bus routes

Seoul used its citizens' late night calls and texts to plan routes for a new night bus service. A telecom company provided the government with anonymous phone data, which officials used to determine the routes most heavily trafficked between midnight and 5am, when the city metro is closed. By implementing a more affordable means of nighttime transportation, Seoul saved citizens $1.2 million in taxi fares over three years.