>>4093 Looks to me like a road resurfacing machine - that might be the scraper bit that goes ahead of the actual asphalt laying bit - those usually have a big hopper thing at the back where all the asphalt is poured. So I think >>4094 is almost right. At the front might be some big wire wheels that spin and scrape off the top layer of the old asphalt and prepare the service as a key for the new asphalt on top.
I am always wildly impressed by those bits of kit, whichever end of the machine it is - when you get the whole "train" of them working and resurfacing, they cover a lot of ground very quickly and leave nothing but perfect road in their wake. Looks like a shitty job to do, but I imagine like most road construction jobs they are paid well. Statistically, working on road works is pretty fucking dangerous.