They are, but with restrictions. For example, 53 ft. trailers aren't allowed without a permit.
The type of tractor trailer that can hold the heaviest loads is a Semi-Trailer truck. This is the heaviest truck that is allowed on the roads.
The best place to look for tractor trailers for sale is on Truck Paper, a company that hosts used trucks and trailers around the world. Their website allows buyers to find listings of sellers selling tractor trailers.
New York, Ohio, and Indiana allow them on toll roads only, although that is not the complete list.
They still are.
This site looks promising http://www.nexttruckonline.com/ they sell trucks, tractor trailers and accessories/maintenance items that you would need for your tractor trailer.
Repossessed tractor trailers can be purchased from some tractor trailer dealers. If the rig was previously financed by a bank, the bank repossessing it will try to sell the tractor trailer to a dealer before selling it to the public.
2.3 million
6 years
The max allowed width is 102 inches. There'll be some 96 inch wide trailers out there, as well.
Most trailers are 102" wide. Anything beyond that requires an oversize permit.
There are several tire store in the area too choose from.You can find a limited selection of tires for tractor trailers in Milwaukee at Sears.
That depends on the size of the tractor trailers (they come in different sizes/models). and how many roadways you will need to get them on/off the land.