Mid-air switch: Chongqing's monorail goes viral

Ever seen a train switch tracks in mid-air? A video of Chongqing's monorail making a remarkably smooth mid-air track switch has gone viral online. Spanning 67 kilometers and carrying more than 1 million passengers a day, Chongqing Rail Transit Line 3 is the world's longest and busiest straddle-type monorail line. And yes, the track really does switch right above the city. (Video courtesy of @yunshangchongqing) #Trending