What is driving range for diesel semi tractor-trailer trucks?

They go as far as they're required to..... if u are talking about range between fill ups it varies. average over the road trucks get 5 to 7 mpg and usually have dual 100 gallon fuel tanks, although some trucks have dual 120 gal. or 150 gal. tanks. Trucks can only use about 90% of the fuel in the tanks before sloshing lets the pickup get air so on average 180 gal. at 6mpg would get a truck 1080 miles between fill ups