When a proposed highway is designated and established as a freeway as provided in this Article, the Department, the county board, or the corporate authorities of any municipality shall have the right to acquire by purchase or condemnation, in the manner the Department, county board, or corporate authorities of any municipality now is or hereafter may be authorized by law, all property and property rights necessary for the location, construction, maintenance and use of such freeway, including any rights or easements of access, crossing, light, air or view to, from or over the freeway vested in property not so taken and abutting the freeway. However, the Department, county board, or corporate authorities of any municipality, as the case may be, may designate by agreement or stipulation points at which access will be permitted from the abutting property to the freeway and specify and enforce the terms and conditions thereof.