KRS 189.210: Maximum weight permitted on highway.

(1) No person shall operate on a highway any vehicle, object or contrivance, other than

a motor truck or semitrailer truck, which weighs more than fifteen (15) tons,

including the weight of the vehicle, object or contrivance and load, except as

provided by subsection (2). This shall not apply to vehicles run upon tracks or fire

apparatus belonging to any municipal or volunteer fire department or used by such a

department in the discharge of its functions.

(2) The county judge/executive or the county road engine er of any county upon an

application in writing by the owner or person having charge of, may grant

permission for the movement of vehicles, objects or structures limited by subsection

(1), over the highways within that county and located outside of a city. The

permission shall be in writing and the county judge/executive or the county road

engineer may grant it subject to such conditions and restrictions as in his judgment

are necessary for the preservation and protection of the highways. The city engineer

or mayor of any city may in like manner grant permission as to the highways within

the city.