These highways were constructed, maintained, or funded by the Maryland State Roads Commission or Maryland State Highway Administration and assigned a unique or temporally unique number.

[MD 711 1] Maryland Route 714 was the designation for Rivers Edge Road, which ran 0.20 miles (0.32 km) from Rivers Edge West north to MD 291 west of Millington in eastern Kent County.

[MD 714 1] The highway was created to re-establish access to the portion of Rivers Edge Road cut off by the construction of what is now US 301 near Millington between 1954 and 1957.

[MD 787 2] The pavement was extended from Piney Branch Road north to Franklin Avenue in Silver Spring between 1931 and 1933.

[MD 787 13] This 0.10-mile (0.16 km) segment, which extended south to Chaney Drive, had already been maintained by the city of Takoma Park.

In November 2010, after a series of discussions on several state highways in the city, the Takoma Park city council proposed the city receive ownership of Flower Avenue from the state in exchange for a one-time payment of $696,000, which was the amount the Maryland State Highway Administration had planned to spend to repave MD 787.

Kent County constructed the first segment, north of MD 290, with state aid as part of the 14-foot-wide (4.3 m) concrete road from Galena south to Lambson Station between 1915 and 1919.

[MD 801 1] Maryland Route 803 was the designation for two segments of Edgar Price Road with a total length of 1.53 miles (2.46 km) near Warwick in southern Cecil County.

The western segment paralleled the northbound side of US 301 from MD 299 to where it curved southeast from the U.S. Highway, where the county-maintained portion of the road began.

The eastern segment of MD 803 began where Edgar Price Road curved northeast.

The highway met the southern end of MD 822 before reaching its eastern terminus at the Delaware state line.

Maryland Route 811 was the designation for Wilson Avenue, which ran 0.19 miles (0.31 km) from the south town limit of Rising Sun north to MD 273 within Rising Sun in northern Cecil County.

[MD 814 3] Maryland Route 822 was the designation for the 0.65-mile-long (1.05 km) section of Joe Meltz Road north from Edgar Price Road, which was then part of MD 803, near Warwick in southern Cecil County.

[MD 835 1] The highway formed a loop on the south side of US 1 west from the western town limit of Rising Sun at Stone Run toward Harrisville.

Maryland Route 873 was the designation for the unnamed 0.37-mile (0.60 km) service road that paralleled the southbound direction of US 15 north from US 15 Business north of Emmitsburg just south of the Pennsylvania state line in Frederick County.

[MD 873 3] Maryland Route 878 was the unnamed designation for a 0.10-mile (0.16 km) service road spur from Broadfording Road west to a dead end immediately southeast of MD 58's interchange with I-81 in Hagerstown.

[MD 878 1] The route was removed from the state highway system in 2015 and transferred to the city of Hagerstown.

Maryland Route 912 was the designation for a pair of highways near Earleville in southern Cecil County.

Both highways were originally part of MD 283, which was paved as a concrete road on the north side of Earleville in 1928.

[MD 912 1] Maryland Route 913 was the designation for the 0.19-mile-long (0.31 km) piece of old MD 267 at its former railroad crossing of the Pennsylvania Railroad (now Amtrak's Northeast Corridor) on the west side of Charlestown in western Cecil County.

MD 983 had a length of 1.02 miles (1.64 km) and ran on the east side of I-95.

[MD 987 1] The highway was originally built as the northern end of the Ellicott and Clarksville Turnpike in the 19th century.

MD 999D was created in a road transfer from Anne Arundel County to the state in 2001.