Kan. Stat. § 68-1904
The highway authorities may designate and establish controlled access highways as new and additional facilities, or an existing street or highway may be included within such facility, and they may provide for the elimination of intersections at grade with existing state or county roads and city streets or other public ways if the public interests shall be served thereby, but no city street, county road or state highway or other public way shall be opened into or connected with such controlled access facility without the consent of the highway authority having jurisdiction over such controlled access facility, and the respective highway authorities are hereby authorized to make all necessary agreements between themselves and the federal government as may be necessary to fully perform and fulfill the purposes and provisions of this act.
K.S.A. 68-1904