aerial air view of a massive construction site with a heavy vehicle, bulldozer and excavator, building a new road, working and unl

aerial asphalt backhoe big build bulldozer concrete construction contractor copter development dig digger dozer drone engineer engineering equipment excavate excavating excavation excavator grader ground heavy hydraulic industrial industry loader machine machinery metal mine pavement pipes quadrocopter quarry road sand scoop shovel site soil structure technology transport transportation truck vehicle work