Maryland Transportation Section 8-319
§ 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.