Whenever property held under one ownership is severed by a freeway, the Department, the county board, or the corporate authorities of any municipality, as the case may be, may grant a limited or restricted easement permitting crossing of the freeway at a designated location and under specified terms and conditions to be used solely for passage from one severed tract to the other. If such severed tracts at any time cease to be held under one ownership, the Department, county board, or corporate authorities of any municipality, as the case may be, may terminate and revoke such easement.