Complex sentence: The articulated haulers relatively small size also make them able to drive on public roads between different worksites at a large construction project--something that is impossible for the largest haul trucks, which might even have to be disassembled to be moved between different locations.
Split into simpler sentences: The articulated haulers relatively small size also make them able to drive on public roads between different worksites at a larger construction project. Something that is impossible for the largest haul trucks, that might even have to be disassembled to be moved between different locations.