‘Everyone thought it would cause gridlock’: the highway that Seoul turned into a stream

Cheonggyecheon stream in the South Korean capital has become an attraction – and helps with flood management, fighting air pollution and cooling the cityOn a crisp December morning, office workers and tourists stroll along a tree-lined stream in central Seoul, pausing on stepping stones that cross its flowing waters. It’s difficult to imagine that just over 20 years ago, this was a vast elevated highway carrying 168,000 cars daily through the heart of South Korea’s capital.Cheo