They call that machine a channel digger or road scraper here in Australia. That kind of machine can fill a semi up in 3-5 minutes depending on capacity, can fill a dump truck up in 2-3 minutes. These machines do work, they don't mess around when it comes to gouging out a trench, be it for kerbing and channeling or for road widening or whatever project it is needed for, they move dirt and lots of it!Same exact equipment outside my house. Took them twenty years. Since I moved here wow. Only most of them are red trucks.