Md. Code, Transportation § 8–319

Property may be acquired under this part for a State highway only if the highway has:

(1) Each of its termini within an area in this State that the Administration recognizes as a principal traffic generating center;

(2) Each of its termini at or near a public highway in this State;

(3) One terminus within an area in this State that the Administration recognizes as a principal traffic generating center and the other terminus at or near a public highway in this State; or

(4) One terminus within an area in this State that the Administration recognizes as a principal traffic generating center or at or near a public highway in this State and the other terminus at the boundary of another state connecting with a highway recognized by the Administration as a principal traffic distribution, collection, or dispersal artery.