The following definitions shall designate limited access highways and shall indicate the control of access to be exercised by each:

(1) "Fully controlled limited access highway" is a highway where the right of owner or occupants of abutting land or other persons to access, light, air, or view in connection with the highway is controlled to give preference to through traffic by providing access connections with selected public roads only, and by prohibiting crossings or direct private driveway connections at grade, with the exception of Type C and F approaches, where no other reasonable means of access exists as solely determined by the department.

(2) "Partially controlled limited access highway" is a highway where the right of owner or occupants of abutting land or other persons to access, light, air, or view in connection with the highway is controlled to give preference to through traffic to a degree that, in addition to access connections with selected public roads, there may be some crossings and some private driveway connections at grade. Commercial approaches to partially controlled limited access highways are allowed only to frontage roads or by means of public road intersections. A partially controlled limited access highway may be designed to provide for separation of a part or all road crossings and the elimination of a part or all direct private driveway connections under a stage plan of future construction.

(3) "Modified controlled limited access highway" is a highway where the right of owner or occupants of abutting land or other persons to access, light, air, or view in connection with the highway is controlled to give preference to through traffic to such a degree that most approaches, including commercial approaches, existing and in use at the time of the establishment, may be allowed.

(4) "An expressway limited access highway" is a partially controlled limited access highway of four or more traffic lanes with the opposing lanes of travel separated by a median strip of arbitrary width.

(5) "A freeway limited access highway" is a fully controlled limited access highway of four or more traffic lanes with the opposing traffic lanes separated by a median strip of arbitrary width.