Original sentence: Because rails were smoother than roads, a greater quantity and tonnage of bulk goods such as coal and minerals could be carried, and without damage to highways.Naturally, a great deal of inventiveness was focused upon improving the rails and reducing the degree of friction between wheel and rail
Edited sentence: A great deal of inventiveness was focused upon improving the durability of rails and roadbed.Because rail transport requires less energy per ton-mile moved than road transport, it is highly suitable for the movement of bulk goods such as coal and other minerals