It was an engineer from the Missouri DOT who designed the tow plow.
I work for the Nevada DOT in Reno. We have two. Ours have a 5yd sander along with a brine tank. I like MO DOTs position of the hydraulic hoses connections. On the right rear of the truck. Ours are located in the back between the bed and the pintle hook and trailer draw bar, making hard to connect/disconnect the "quick connects" There's, I think about eight hoses. One to lower the blade, one to raise it, one to turn the trailer, one to return it, one for the sander, one for the brine system, a return line, maybe seven. Air hoses for the brakes, two plugs, all crammed in a three square foot area. Plus two heavy duty safety chains. And if the hydraulic hoses are pressurized?
They do the job of two trucks with about a 10% increase in fuel. Several states have them along with Canadian Provinces. I think they're cool.
I have a friend from school who lives in Moberly.