It shall be unlawful for any person, corporation, firm or association to install, construct, erect, maintain or operate within fifty (50) feet of the right of way of any federal, state or federal and state highway or any turnpike project a flashing or revolving sign, light or reflector which is red or amber in color when lighted or when light rays are focused on it: Provided, That the provisions of this section shall not apply to signs, lights or reflectors:
K.S.A. 68-167