When I worked for the highway department in the early 70's, the maintenance shed had an old Oshkosh 4X4 truck. What a monster it was. No power steering, only marginally boosted brakes, non-synchronized transmission, and a huge in-line 6 gas engine. About 40 MPH top speed BUT, it would plow snow where nothing else would. They'd actually taken a small V-plow and modified the mounts to fit the truck. With tire chains on the front axle(for directional control as much as traction) and 5-6 ton of gravel "chips" in the dump box, it would plug along at 20 MPH knocking out snow drifts that would stop a motor grader in it's tracks. Most times it had a 2 man crew especially if it had the wing plow attached. The #2 man controlled the wing with a set of hydraulic levers mounted on the right hand dash. The operators switched places every hour or so since the thing was so hard to steer, the driver wore out quickly. In the summer, it was the "stuck mower tractor retriever" with 100' of cable coiled up in the bed.