都市の通りから地下鉄駅へのタイムラプス

Timelapse video from a fixed camera above a city boulevard, traffic tapering around barricades and chalked survey lines. Slurry walls trench in; cranes lift rebar cages; the street peels back into a neat rectangular cut. Excavation steps down to a cavern; arches are shotcreted smooth; mezzanine beams lock across the void. Escalators lower in one piece, rails gleam; tile crews raster mosaics along the concourse. Platform screen doors set; signage blooms; ventilation stacks cap the sidewalks. Test trains ghost through, brake lights pulsing. At opening night, the metro station breathes commuters up and down, a river of color under the restored street.