W. Va. Code § 17C-17-11a
If, in the opinion of the commissioner of the department of highways, the design, construction and safety of any highway, or portion thereof, are such that the gross weight limitations prescribed in section nine of this article can be increased without undue damage to any such highway, the commissioner may, by order, increase the gross weight limitations of vehicles which may be operated upon any such highway, or portion thereof, designated by him in such order and may establish therein the gross weight limitations which shall thereafter be applicable to the highway or portion thereof so designated by him: Provided, That the maximum gross weight, including the load established by the commissioner for any such designated highway or portion thereof, shall not exceed eighty thousand pounds, except as otherwise provided in this article: Provided, however, That no such order of the commissioner shall establish any weight limitation in excess of or in conflict with any weight limitation prescribed by or pursuant to acts of Congress with respect to the national system of interstate and defense highways.
W. Va. Code § 17C-17-11a