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MD 5 runs south from DC and merges into US 301. For the length of this exit list, there are no driveways on MD 5. IOW it can be easily converted to freeway, and in fact several interchanges have been built. There are some frontage roads north of I-95/495, most of which are state-maintained as secret MD 967.

5	301 NORTH Baltimore				301 5	Y
5	Accokeek Rd 373 373 381			Accokeek Rd 373 373	5
5	Brandywine Rd			Brandywine Rd 381	5
5	Moores Rd Crestwood Ave			Crestwood Ave Moores Rd	5
5	Earnshaw Dr Burch Hill Rd			Burch Hill Rd Earnshaw Dr	5
5	Surratts Rd			Surratts Rd	5
5 Washington	223 Woodyard Rd Mellwood Clinton			223 Woodyard Rd Clinton Mellwood	5 301	SPUI
5	Malcolm Rd Schultz Rd			Schultz Rd Malcolm Rd	5	diamond
5	Coventry Way			Coventry Way	5	SPUI?
5	Alexandria Ferry Rd			Kirby Rd Old Branch Ave	5
5	337 Allentown Rd Camp Springs			337 Camp Springs Andrews AFB	5	SPUI
5	Deerpond Ln			Linda Ln	5	SW, SE road between
5 Branch Ave Silver Hill	95 495 NORTH Beltway NORTH Baltimore College Park 95 495 SOUTH Beltway SOUTH Richmond VA Alexandria VA Auth Rd			95 495 NORTH Beltway NORTH Baltimore College Park Auth Rd 95 495 SOUTH Beltway SOUTH Richmond VA Alexandria VA	5 Branch Ave Waldorf	cloverleaf I-95 exit 7
5	Auth Way 967			Auth Way 967	5
5	Beech Pl 967			Beech Pl 967	5
5	WEST Old Branch Ave 967			EAST Old Branch Ave 967 WEST Old Branch Ave 967	5
5 Washington	414 EAST St Barnabas Rd 414 WEST St Barnabas Rd			414 St Barnabas Rd	5	SW, SE road between with NE leaf
5	Shopping Center			Shopping Center	5
5	Silver Hill Rd Iverson St 458			Iverson St Silver Hill Rd 458	5
5	Colebrooke Dr 967			Colebrooke Dr 967	5
5	Bonita St 32nd Ave 414 967			32nd Ave Bonita St 414 967	5
5	Curtis Dr			Curtis Dr	5
5	Naylor Rd 637			Naylor Rd 637	5
MEDIAN ENDS DRIVEWAYS BUT NO ROADS
5 Branch Ave	Suitland Pkwy Andrews AFB Suitland Pkwy Washington			Suitland Pkwy Andrews AFB Suitland Pkwy Washington	5 Branch Ave	SW, NE road between

Thanks to John Cambron for info.