How much fuel does a semi-trailer consume per kilometer?

For an ordinary semi-trailer, under normal road conditions and standard load, the fuel consumption per 100 kilometers is between 36L-45L, calculated based on a total weight of 50T.
There is no standard, unified, and accurate answer to this question, because it involves the influence of objective factors such as personal driving habits, driving conditions, and vehicle models. Moreover, in actual operation, most semi-trailers are overloaded, and they run faster to make money, so in this case, 50 liters of fuel consumption per 100 kilometers is definitely not enough. If you drive on the highway, it will be slightly less.