The Mayor and City Council of Baltimore may designate and establish controlled-access highways as new and additional facilities or may designate and establish an existing street or highway as included within a controlled-access facility. The Mayor and City Council of Baltimore shall have authority to provide for the elimination of intersections at grade of controlled-access facilities with existing streets, by grade separation or service road, or by closing off such roads and streets at the right-of-way boundary line of such controlled-access facility; and after the establishment of any controlled-access facility, no highway or street which is not part of said facility shall intersect the same at grade. No city, street, or other public way shall be opened into or connected with any such controlled-access facility without the consent and previous approval of the Mayor and City Council of Baltimore. Such consent and approval shall be given only if the public interest shall be served thereby. P.L.L., 1949. §701 1969, §21-7 1948 Sp. Sess., ch. 27