1,200 Japanese workers convert above-ground train to subway line in just 3 hours

On March 15, 2013, the Shibuya Station Toyoko Line above-ground train quietly shut down for good, to be replaced with a new section of subway track connecting Shibuya Station and the nearby Daikanyama Station. Converting the line from above-ground to underground was a massive operation, requiring a grand total of 1,200 engineers and countless man-hours.