MILES	MAP AREA	YEAR
OML 0 to 3	Baltimore to West Baltimore	1904
OML 4 to 9	Lansdowne to Orange Grove	1947
OML 10 to 11	Orange Grove to Ilchester	1949
OML 11 to 30	Ilchester to Gaither	1906
OML 31 to 45	Hoods Mill to Bartolows	1945
OML 45 to 62 also Frederick Br	Monrovia to Doubs	1931
OML 63 to 81 also Met 65 to 81	Doubs to Harpers Ferry	1910
Wash 0 to 3	Baltimore to West Baltimore	1904
Wash 4 to 13	Lansdowne to Dorsey	1947
Wash 14 to 29	Dorsey to Greenbelt	1949
Wash 30 to 35	Greenbelt to DC Line	1945
Wash 34 to 37	North Brentwood to Ivy City	1945
Wash 38 to 40	Ivy City to Union Station	1945
Met 0 to 1	Ivy City to Brookland	1945
Met 1 to 7	Brookland to Silver Spring	1945
Met 7 to 14	Silver Spring to Halpine	1945
Met 14 to 24	Halpine to Clopper	1944
Met 24 to 39	Germantown to Tuscarora	1908
Met 39 to 40	Tuscarora	1931
Met 40 to 42 Met 69 to 81	Tuscarora to Harpers Ferry	1910
Georgetown Br 0 to 0	Silver Spring to North Chevy Chase	1908
Georgetown Br 0 to 7	North Chevy Chase to Potomac Heights	1945
Georgetown Br 7 to 12	Potomac Heights to Georgetown	1945
A&ERR 0 to 4	Annapolis Junction to Ft. Meade	1949
A&ERR 4 to 20	Ft. Meade to Igelhart	1947
A&ERR 19 to 22	Bestgate to West Annapolis	1905