No longer assigned (decommissioned 1996).

The former MD 860 is an old alignment of MD 235.

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Not assigned.

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Not assigned.

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Unmarked, officially 863A.

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Unmarked, associated with MD 292.

A piece of the old MD 292.

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Not assigned.

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Not assigned.

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Not assigned.

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Unmarked, officially 868G, associated with MD 234.

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No longer assigned.

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Unmarked, officially 870F.

MD 870 shows up on the back of emission test notices on the map to the Frederick emissions station.

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Unmarked.

Sections of MD 871:
MD 871F: (no name) 0.16 mi.; two dead ends, crossing MD 180.
MD 871G: Rosemont Dr. 0.94 mi.; from MD 79 north to MD 17. Parallels east side of MD 17.

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Unmarked, associated with US 340, MD 180.

A pre-freeway section of old US 340 (now MD 180).

Decommissioned sections of MD 872: These sections of 872 appeared on ADC maps in the early nineties. They paralleled the north side of US 340 but are not service roads.
MD 871B: Brentland Rd. west off Catholic Church Rd.
MD 871C: (no name) east off South Mountain Rd.

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Unmarked.

A short stub precariously close to the Pennsylvania line.

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Marked north-south, associated with MD 75.

Route 874 consists of some old sections of MD 75 near New Market, after 75 was reconfigured to bypass New Market to the east and connect with I-70. This project wasn't fully completed south of I-70, as there is a shift back to the old 75 just past the I-70 interchange opposite New Market. The primary section of this route, 874D, is signposted in New Market at its meeting with MD 144, Prospect and Main Streets, respectively.

Sections of MD 874: These run north to south along the west side of MD 75.

MD 874: Drummine Rd. 0.56 mi.; loop west off MD 75.
MD 874B: (no name) 0.08 mi.; south off MD 75 to road end.
MD 874C: Old New London Rd. 1.56 mi.; loop west off MD 75.
MD 874D: Old New Windsor Rd., Prospect St. 0.80 mi.; from MD 144 (Main St.) north to MD 175.
MD 874E: (no name) 0.14 mi.; north off MD 874C to road end.

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No longer assigned (decommissioned 199x).

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Not assigned.

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Unmarked, officially 877B.

Parallels south side of I-70 east of MD 75, which uses the western part of East Baldwin Rd. to connect the newer alignment for the I-70 interchange with the old one now closed, which used to pass through New Market (see 874 above).

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Unmarked.

Possibly an old alignment of MD 58, before construction of I-81.

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Unmarked, associated with MD 91.

Route 879 is the old 91, prior to 91 being straightened with full shoulders.

Sections of MD 879: Running south to north along MD 91.

MD 879: Old Gamber Rd. 0.20 mi.; from MD 91 west to road end.
MD 879A: (no name) 0.11 mi.; Two dead ends along northwest side of MD 91 just east of Deer Park Rd.
MD 879B: Old Gamber Rd. 0.58 mi.; loop northwest off MD 91.
MD 879C: (no name) 0.06 mi.; from MD 91 east to road end.
MD 879D: Old Gamber Rd., Cedarhurst Rd. 0.91 mi.; loop south of MD 91 across MD 140. Old Gamber Rd. southwest of 140, Cedarhurst to northeast.

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