Heavy machinery lowers box-like concrete piece with worker on top
https://www.codot.gov/projects/archived-project-sites/us50interchange/photo-gallery/us-50-photo-3-12-20-21.jpg/view
https://www.codot.gov/projects/archived-project-sites/us50interchange/photo-gallery/us-50-photo-3-12-20-21.jpg/@@download/image/US 50 photo 3 12.20.21.jpg
Heavy machinery lowers box-like concrete piece with worker on top