The distance a semi-truck can travel at freeway speeds depends on several factors, including the size of the fuel tanks, the fuel efficiency of the truck, and the type of road conditions. On average, a semi-truck can travel between 400 to 600 miles (640 to 965 kilometers) on a full tank of fuel.
However, it's important to note that various factors can affect the actual range. These factors include the truck's weight, cargo load, wind resistance, terrain, driving style, and whether the truck is pulling a trailer. Additionally, newer trucks often have improved fuel efficiency compared to older models, which can also affect the range.
To get a more accurate estimate of a specific semi-truck's range, it's best to consult the manufacturer's specifications or consult the truck's owner's manual, as they will provide the most accurate information regarding fuel capacity and estimated range.