Every building along the lines are connected via footbridges above ground. You can walk through them without crossing any roads. Sha Tin, Hong Kong
https://lemmy.cafe/pictrs/image/aa564b98-ca5b-46fc-a2ce-9c5a7c750e44.webp
https://lemmy.cafe/pictrs/image/aa564b98-ca5b-46fc-a2ce-9c5a7c750e44.webp