When I was a kid growing up in the 60's we had 3 trashmen working a truck. 1 man to drive and 2 men at the rear loading the trash. The 3 man crew eventually evolved into a 2 man crew...1 to drive and 1 to load. Now our trash pickup is done by a 1 person crew. The driver gets out and loads the trash then gets back in and moves the truck up a few yards, then gets out to load more trash. Now they are working on a self-driving, robot run trash truck.