The Board may plan, designate, acquire, open, construct, reconstruct, improve, maintain, discontinue, abandon, and regulate the use of limited access highways in the same manner in which it is now or may be authorized to plan, designate, acquire, open, construct, reconstruct, improve, maintain, discontinue, abandon, and regulate the use of other highways within the Commonwealth. The Board shall also have any and all other additional authority and power relative to other highways, which shall include the right to acquire by purchase, eminent domain, grant, or dedication title to such lands or rights-of-way for such limited access highways. Notwithstanding any other provisions of this Code, any highway, street, or portion thereof to which access rights of abutters have been acquired by the Board and which is subsequently incorporated into the street system of a city or town by any method shall remain limited access until and unless the governing body of the city or town, after securing the approval of the Board, acts to discontinue such limited access feature.