As used in this act:

    (1) "Advertisement" means any writing, printing, picture, painting, display, emblem, drawing, sign or similar device which is posted or displayed outdoors on real property and is intended to invite or to draw the attention or to solicit the patronage or support of the public to any goods, merchandise, property, real or personal, business, services, entertainment or amusement, manufactured, produced, bought, sold, conducted, furnished or dealt in by any person or for any political party or for the candidacy of any individual for any nomination or office; and the term shall also include any part of an advertisement recognizable as such.

    (2) "Bus passenger shelter" means any rigid structure situated upon or attached to real property outdoors, primarily or principally for the purpose of furnishing a waiting room or shelter for the use and convenience of the passengers of common motor carriers, but suitable for the purpose of furnishing a background, base or support upon which an advertisement may be posted.

    (3) "Highway" means every way or place of whatever nature open to the use of the public for purposes of vehicular travel in this state.

    (4) "Municipality" means any city or incorporated village.

    (5) "Post" means post, display, print, paint, burn, nail, paste or otherwise attach.

    (6) "Real property" means any property physically attached or annexed to real estate in any manner whatsoever.

     Persons, firms, corporations and municipalities may enter upon, construct and maintain bus passenger shelters with all necessary erections and fixtures therefor upon that portion of any highway lying within the corporate limits of municipalities. Every person, firm, corporation and municipality before any of the work of construction and erection is commenced shall obtain the consent of the duly constituted authorities of the municipality.

     If it is proposed to construct a bus passenger shelter on that portion of a county road lying within the corporate limits of any municipality, the consent of the board of county road commissioners both as to location and duration shall also be obtained before the construction is commenced. If it is proposed to construct a bus passenger shelter upon that portion of a state trunkline highway lying within the corporate limits of any municipality, the consent of the state highway commissioner both as to location and duration shall be obtained before the construction is commenced.

     The municipalities in which bus passenger shelters are proposed to be erected shall have the exclusive power to prescribe the size, shape and nature of the bus passenger shelters, and to supervise their construction and maintenance.

     The construction and maintenance of all such bus passenger shelters shall be deemed to be for the use and convenience of the public, but nothing in this section or in sections 2, 3 or 4 shall be construed to grant any rights whatsoever to any person, firm, corporation or municipality whatsoever or to impair in any way any existing rights granted in accordance with the constitution or laws of this state, but shall be construed as a regulation of the exercise of all such rights.

     Advertisements of such size, shape and nature as the municipality in which such advertisements are proposed to be posted shall approve may be posted in such quantity and upon such portions of duly authorized bus passenger shelters as such municipality shall approve.