Maryland Route 140

Maryland Route 140 (MD 140) is a 49 mi state highway in the U.S. state of Maryland. The route runs from U.S. Route 1 (US 1) and US 40 Truck in Baltimore northwest to the Pennsylvania border, where the road continues into that state as Pennsylvania Route 16 (PA 16). MD 140 passes through the northern part of central Maryland, connecting Baltimore, Pikesville, Reisterstown, Westminster, Taneytown, and Emmitsburg.

Route description
MD 140 is a part of the main National Highway System from I-795 in Reisterstown to US 15 in Emmitsburg. The highway has two segments where it serves as an intermodal connector: from Patterson Avenue in Baltimore to I-695 in Pikesville and from Painters Mill Road to Owings Mill Boulevard in Owings Mills. The remaining portions of MD 140 between its southern terminus in Baltimore and I-795 are classified as National Highway System principal arterials.

Baltimore to Reisterstown
MD 140 begins as a one-way pair of streets at North Avenue northwest of downtown Baltimore. Northbound MD 140 follows Fulton Avenue, which is a two-way street on both sides of North Avenue, and the southbound route follows one-way Monroe Street. US 40 Truck follows North Avenue through the pair of intersections, northbound US 1 enters from the south on Fulton Avenue and turns east onto North Avenue, and southbound US 1 enters from the east on North Avenue and turns south onto Monroe Street. Northbound MD 140 follows four-lane divided Fulton Avenue north for three blocks between the Penn North neighborhood to the east and Mondawmin on the west. The route reaches a four-way intersection with Pennsylvania Avenue and Reisterstown Road, which head southeast and northwest, respectively. Fulton Avenue veers northeast while MD 140 turns northwest onto Reisterstown Road. The highway passes along the southwest side of the Parkview/Woodbrook neighborhood and intersects Gwynns Falls Parkway just before Monroe Avenue splits off as a one-lane ramp from southbound Reisterstown Road. Monroe Avenue immediately expands to two lanes and intersects the parkway, heads southeast, then veers south toward southbound MD 140's terminus at North Avenue. One block north of the convergence of the one-way pair, the state highway intersects Liberty Heights Avenue, which heads west as MD 26, on the east side of Mondawmin Mall. Adjacent to the MD 140–MD 26 intersection is the Mondawmin station of MTA Maryland's Baltimore Metro SubwayLink.

MD 140 continues northwest as a six-lane boulevard along the northeast edge of the Liberty Square neighborhood. The highway has an oblique intersection with MD 129 (Auchentoroly Terrace)&mdash;there is no direct access from northbound MD 140 to southbound MD 129 or from northbound MD 129 to southbound MD 140&mdash;after which the two state highways run concurrently along the west side of Druid Hill Park. MD 140 and MD 129 diverge at a five-way intersection with Druid Park Drive that does not allow direct access from southbound MD 140 to northbound MD 129. MD 140 continues northwest as a four-lane undivided highway paralleled by MD 129 (Park Heights Avenue) one block to the east through the Park Circle neighborhood. MD 140 passes the Louisa May Alcott School and enters Central Park Heights, where the state highway intersects Cold Spring Lane before veering west along the northern edge of the Towanda-Grantley and Lucille Park neighborhoods and the southern edge of Langston Hughes neighborhood. At Belvedere Avenue, MD 140 veers northwest and enters a commercial area within the Woodmere neighborhood. The highway intersects Northern Parkway and passes between the neighborhoods of Glen to the northeast and Reisterstown Station on the southwest. Within the latter neighborhood is the Reisterstown Road Plaza shopping center and its attendant Metro SubwayLink station. MD 140 passes along the edge of the Falstaff neighborhood before leaving the city of Baltimore south of Seven Mile Lane.

MD 140 continues northwest through Pikesville as a four-lane undivided highway that passes the Pikesville Armory, Suburban Club Golf Course, the Maryland State Police headquarters, and Druid Ridge Cemetery and intersects Old Court Road. North of that county highway, the state highway gains a center turn lane and meets I-695 (Baltimore Beltway) at a single-point urban interchange. MD 140 meets the western end of MD 130 (Greenspring Valley Road) and passes the campus of Garrison Forest School in Garrison. Within Owings Mills, the state highway has a one-quadrant interchange with Owings Mills Boulevard, passes under the boulevard and CSX's Hanover Subdivision, and passes by the Owings Upper Mill complex. Shortly after entering Reisterstown, MD 140 intersects Franklin Boulevard and Cherry Hill Road and passes by Franklin High School and historic St. Michael's Church. The highway veers north, its name changes to Main Street, and it reduces to two lanes, with occasional center turn lanes, as it enters the Reisterstown Historic District. At the north end of the downtown area, the roadway continues north as MD 30 (Hanover Pike) and MD 140 turns northwest onto two-lane undivided Westminster Pike, now signed as an east-west highway.

Reisterstown to Emmitsburg
On the western edge of Reisterstown, MD 140 (now an east-west highway) has an intersection with the northern end of I-795 (Northwest Expressway) and MD 795, an unnamed and unsigned connector between this intersection and the intersection of MD 30 and MD 128 on the northern edge of Reisterstown. The state highway splits into a pair of flyover ramps that connect with ramps to and from I-795 west of the MD 795 intersection. The eastbound ramp is two-way west to Mitchell Drive, which provides access to the Reisterstown Sportsplex. The ramps merge and MD 140 continues northwest as a four-lane divided highway with a narrow median. West of Woodfield Court and Brian Daniel Court, which westbound MD 140 accesses via a ramp to Gores Mill Road, the median changes to a center left-turn lane. The highway descends into the valley of the North Branch of the Patapsco River and crosses the river and the Baltimore–Carroll county line at the northern end of the river's impoundment, Liberty Reservoir. MD 140 continues northwest as Baltimore Boulevard, now again a four-lane divided highway. The first of several segments of the highway's old alignment, Old Westminster Pike, splits to the southwest as the highway approaches Finksburg, where the highway intersects MD 879, which heads north as Cedarhurst Road and south as Old Gamber Road, and MD 91, which heads north as Emory Road and south as Gamber Road. Access from eastbound MD 140 to northbound MD 91 is via a jughandle in the southwest quadrant of the intersection.

Old Westminster Pike first closely parallels the westbound side of MD 140 and then splits west from the eastbound direction and parallels the state highway at a distance. MD 140 expands to six lanes and passes through a commercial area as it enters the city of Westminster. The highway intersects Malcolm Drive, which heads south as MD 97, and continues northwest concurrent with that state highway. The two highways pass the TownMall of Westminster just east of their partial cloverleaf interchange with MD 27 (Manchester Road), just west of which they cross over the Maryland Midland Railway. MD 140 and MD 97 become College View Boulevard at Sullivan Road; the highways diverge at a partial cloverleaf interchange where MD 97 heads north as Littlestown Pike and Pennsylvania Avenue heads south into the Westminster Historic District. MD 140 continues west as four-lane College View Boulevard, which becomes undivided three-lane (one lane westbound, two lanes eastbound) Taneytown Pike at its intersection with the northern end of MD 31 (New Windsor Road), which provides access to McDaniel College. There is no access from eastbound MD 31 to westbound MD 140; that movement is provided by WMC Drive to the west.

MD 140 heads northwest as a partially controlled access two-lane road. At Meadow Brook Farm and Roop's Mill on the western edge of the city of Westminster, the highway crosses Meadow Branch of Big Pipe Creek and has an intersection with Hughes Shop Road and the eastern end of MD 832 (Old Taneytown Road). MD 140 parallels MD 832 to the north as the main highway bypasses Frizzelburg and crosses Richardson Road, Bear Branch, and the mainstem of Big Pipe Creek. The two state highways reunite at a roundabout on the eastern edge of the city of Taneytown. Antrim Boulevard forms the southwest leg of the roundabout and MD 140 continues northwest along Baltimore Street into the Taneytown Historic District. The state highway passes to the north of the historic home Antrim and has a grade crossing of the north–south line of the Maryland Midland Railway before intersecting MD 194, which heads north as York Street and south as Frederick Street. MD 140 becomes Taneytown Pike again on leaving Taneytown and crosses Piney Creek.

MD 140 crosses the Monocacy River to enter Frederick County. The highway crosses Cattail Branch and Middle Creek and enters the town of Emmitsburg just east of the highway's extended interchange with US 15 (Catoctin Mountain Highway). East of the U.S. Highway, MD 140 has a four-way intersection with Harney Road and Emmit Gardens Drive, which is unsigned MD 904H (Emmit Gardens Drive) and leads to a right-in/right-out interchange with northbound US 15. MD 140 becomes Main Street and crosses over the U.S. Highway, then has a four-way intersection with Silo Hill Road and unsigned MD 904F, another section of Emmit Gardens Drive that leads to the right-in/right-out ramps with southbound US 15. MD 140 crosses Flat Run and enters the Emmitsburg Historic District. In the center of town, the highway intersects US 15 Business (Seton Avenue). MD 140 leaves the town and gains the name Waynesboro Pike for the short distance northwest to the Pennsylvania state line. Waynesboro Pike continues northwest as PA 16 across South Mountain toward Waynesboro.

<!-- History Notes

Maryland Historical Trust

Ten Mile House: built 1795, demolished 1967, ten miles from Baltimore (southern terminus of Pennsylvania Avenue at Franklin and Greene)

Tollgate site: west side of Reisterstown Road opposite Strawhat Drive in Owings Mills; collection of tolls discontinued May 25, 1915

16 and 17 mile stones are in Reisterstown Historic District 16-mile: 342 or 337 Main Street in Reisterstown 17-mile: SE corner of intersection of Hanover Road and Butler Road

From milestones article: Reisterstown Turnpike was also called the Conewago Road, Great Road to Baltimore Town, High Street, and Main Street. Turnpike had a presence for 220 years. Turnpike ran from Franklin Street in Baltimore northwest along Pennsylvania Avenue and Reisterstown Road to Pennsylvania. Begun in 1806 and completed in 1815.

Reisterstown Historic District: Reisterstown is the best preserved turnpike town in the Baltimore suburbs, having resisted suburban sprawl that has swallowed up York Road and Liberty Road; district extends from Butler Road south to Woodley Avenue. Two roads converged to form Main Street; one from the north and the other from the northwest. Reisterstown has never been a wide town. On Hanover Road, development stops abruptly at Butler Road; Westminster Road this process is less evident due to 20th century changes. Main Street is four lanes in width including a lane of parking on each side. After the road is bypassed, it is hoped the street will be made a bit narrower and trees planted on both sides. Reisterstown founded 1758 as a convenient stopping point one day's journey from Baltimore.

Bridgeport Survey District: Taneytown Pike was established in the early to mid 19th century. The turnpike ran through the district by 1858 and a bridge over the Monocacy existed by then.

18-mile House existed at 808 Westminster Pike, just west of Gore's Mill Road.

Reisterstown Road crossed 1888 Baltimore city limits at Ridgewood Avenue

Report on the Highways of Maryland: p. 218 (map on p. 220) Baltimore and Reisterstown Turnpike: Baltimore to Reisterstown, with two branches to Carroll county line p. 224: Westminster and Meadow Branch Turnpike: Westminster to Meadow Branch (2 miles) Baltimore and Reisterstown Turnpike: several segments: PA line through Union Mills to Westminster Westminster to Reisterstown Map on 220 shows county road from end of Meadow Branch Turnpike to Taneytown and abandoned toll road from Taneytown to (p. 232) Emmitsburg

Original State Roads: MD 140 from Westminster to Taneytown MD 140 east of Emmitsburg: under construction

Roads paved by 1910: Main Street in Westminster?

Roundabouts: Taneytown Roundabout installed in 1996

RTDS

USGS Westminster 1954: was Old Baltimore Road the connector between the temporary end of divided highway and Main Street; seems unlikely as that road is two lanes; old US 140 is MD 526

USGS Reisterstown 1953: four lanes from Patapsco east to Amy Brant Way

Maps

1910: State road planned Westminster to Taneytown; MD 129-MD 140 concurrency planned north of Reisterstown Road-Pennsylvania Avenue intersection

1915: State roads completed Taneytown to just west of Westminster and a little piece within Baltimore; planned everywhere else except west of Emmitsburg

1921: concrete from north end of Pennsylvania Avenue to Reisterstown; macadam from Reisterstown to south end of Westminster; concrete along Littlestown Pike from Westminster to PA line; macadam from Westminster to Roop's Mill; concrete from Roop's Mill to Emmitsburg; nothing from Emmitsburg to PA line

1923: concrete on Fulton south from Reisterstown Road and Pennsylvania Avenue from there south to North Avenue; concrete added from Emmitsburg to PA line; macadam replaces concrete from RR in Taneytown east 2-3 miles; streets of Westminster still not marked as paved

1927: MD 32 marked from west of Emmitsburg to Westminster; US 140 marked Littlestown to Westminster and on to Baltimore; Westminster streets not paved

1933: concrete section east of Taneytown now concrete

1934: US 140 marked on Reisterstown Road in city; U.S. Route follows Pennsylvania Ave south to US 1; circle is marked at Park Heights Ave intersection

1946: Fulton and Pennsylvania marked on Baltimore inset

1948: US 140 on Monroe Street south of Reisterstown Road?; US 140 relocated at Patapsco River

1950: US 140 is divided highway from MD 26 to MD 129; Monroe or Fulton and Pennsylvania marked; red divided highway from Finksburg to flip of Old Westminster, then black divided highway to Sandy Mount Road; black divided highway proposed from Roop's Mill to 1 mi E of MD 32 south split

1951: black divided highway and Westminster Bypass proposed gone

1952: divided highway from temporary end to MD 32 or Gorsuch Road (not clear where road temporarily ended)

1954: Westminster bypass splits off divided highway east of then city limits; divided highway to just west of US 140, then two lanes to end of bypass

1956: red line marked on Pennsylvania Avenue; divided highway ends just west of Finksburg; Malcolm Drive built (or existed before?); MD 97 replaces MD 32 through and west of Westminster

1963: US 140 is moved to Monroe/Fulton from Pennsylvania Avenue

1964: Only 526 on Pennsylvania Avenue remains; new Taneytown Pike under construction

1972: US 140 marked on Fulton/Monroe; split onto Monroe just south of MD 26; divided highway extends to dot of Finksburg; divided highway from Patapsco River east 1 1/2 mi

1979: US 140 is gone; MD 140 from Baltimore to Emmitsburg; MD 97 from Westminster to Littlestown; 526 marked in Westminster on Pennsylvania Ave

1985: no divided highway east of Patapsco or east of MD 91

1987: I-795 complete

SRC Reports

Reisterstown Road was not one of the original state roads

1915: p. 50: Uncompleted Secondary Gaps: Emmitsburg-Bridgeport (5.00) Bridgeport-Taneytown (3.50, not original state road) Westminster-Fountain Valley Turnpike (1.94, resurfacing) Westminster-Fenby Turnpike (2.50, resurfacing) p. 53: Large Incorporated Towns with Uncompleted Gaps in Them: Westminster (2.10) p. 58: State Road Bridges Constructed 1912-1915: Patapsco River-Finksburg Road (1913) p. 106: Completed State Roads 1908-1915: all 14' macadam unless indicated Fountain Valley-Frizzelburg (1.38, 1914, 12' M, 14' C) Taneytown-Frizzelburg (1.72, 1914, 14' C) Copperville Road-Frizzelburg (5.47, 1915, 14' C) p. 116: Completed State Roads 1908-1915 Reisterstown Road from Pimlico Cir to Elgin Ave (1.08, 1915, sheet asphalt) Reisterstown Road-Pimlico Cir to city limits (1.25, 1915, sheet asphalt) p. 120: Turnpike Purchases: Reisterstown Turnpike (15.18) p. 122: Completed State-Aid Roads: Finksnurg (1.02, 14' M) Bridge over N Branch Patapsco (130' reinforced concrete) (140 or 26?) p. 128: Uncompleted State Aid Roads: Reisterstown Road from city limits to Haywood Ave (0.93, 40' asphalt)

1919: p. 22: 13.40 mi of State Highways built in period, 7.46 mi M and 5.94 mi C; 3.25 mi of gap between Emmitsburg and Bridgeport complete Under construction (5.61 mi): Emmitsburgh to Bridgeport Road (15' C, 1.86 mi, 90 percent G&D) p. 23: State Road Construction: Between 1916 and 1919, 6.8 mi of modern highways built completing gaps between Westminster and Manchester, Westminster and Emmitsburg, and Westminster and Sykesville... p. 24: with exception of 3.14 mi of 14' C between Taneytown and Bridgeport, all macadam; now under construction: Littlestown Pike from Westminster to Union Mills, 4 mi 16' C ... The first-named route has been practically completed State-Aid Construction: During 1916, 1917, and 1918, Reisterstown-Westminster Turnpike (8.7 mi) was built and taken over for state maintenance. Under construction: Littlestown Pike from Union Mills north (6.62 mi, 16' C) Littlestown Pike: 2 mi complete on Union Mills end, making a total of 6 mi improved road constructed on this pike this year p. 26: Baltimore County West of Reisterstown: Gap filled in Baltimore-Westminster Pike for 2.55 mi of Amiesite, M, and C, all 16-ft in width, in 1918. p. 38: Nine sections of road on all main thoroughfares out of Baltimore constructed; all completed between 1916 and 1919 except York Road from Parkton to Maryland Line and the road through Reisterstown, which will not be completed until next year. Bridge over Patapsco on Westminster Pike extensively repaired. p. 71: State-Aid Bridges Constructed 1916-1919 BA: Owings Mills-Reisterstown Road over Gwynns Falls (1917) p. 72: Contracts Awarded by SRC from Bond Issue Authorized by Legislature of 1916 (not including bridges): BA: Reisterstown Road (2.53, M) BC: Pennsylvania Avenue (0.27) p. 75: Contracts awarded by SRC from Bond Issue Authorized by Legislature of 1918, as of 1/1/1920 Through Reisterstown (0.76, 39' C)

1926: p. i (facing title page): Macadam road with concrete shoulders at entrance to Westminster, with billboard sign showing map of city and directions p. 44: Concrete shoulders added for total of 26.47 mi along Liberty Road, York Road, Reisterstown Road, Falls Road, and Eastern Avenue p. 46: Baltimore County west of Reisterstown: 3' of concrete shoulders added on both sides of Westminster-Reisterston Road from Carroll Co line to Reisterstown (2.55 mi) to add 6' to width in summer 1925 p. 47: In 1925, concrete shoulders added along Westminster-Reisterstown Road to the Balto Co line (8.70 mi), adding 6' to the traveled width of road p. 49: One-way bridges replaced with 24' to 30' bridges: In 1925, old covered bridge over Monocacy at Bridgeport replaced with modern triple span concrete-steel arch. p. 84: Lateral and Post Road Funds: Emmitsburg-PA line (1924) p. 114: Baltimore City Fund: Reisterstown Road (1924) Pennsylvania Avenue (1925-26)

1930: p. 82: roads widened to 20 feet: US 140 from Baltimore to Carroll Co, MD 140 from Balto Co to just east of Taneytown

1934: p. 19: Baltimore County Roads Recommended for Widening: US 140 from Reisterstown to Westminster (11.24) from 20 to 30 ft US 140 from Reisterstown to Westminster (11.24) from 20 to 30 feet US 140 from Littlestown to Westminster (10.60) from 16 to 20 ft p. 28: Outstanding Construction and Reconstruction Projects: Improvement of Westminster-Taneytown-Emmitsburg Road to PA line has been completed; this work involved reconstruction and widening to 20 ft of the existing road (photo p. 31) p. 32: Reisterstown Road widened from 20 to 40 ft between Pikesville and Reisterstown. ROW obtained through abandonment of United Railways trolley tracks, which were removed; road also widened between Baltimore City line and Pikesville Westminster-Taneytown-Emmitsburg Road to PA line reconstructed and widened to 20 feet

1936: p. 99: Baltimore City: Reisterstown Road widened with 10-ft concrete shoulders on the east from Hayward Ave to the city line.

1938: p. 4: 10-ft concrete shoulder added along edge of existing macadam to Reisterstown Road from City Line to Slade Ave (0.6 mi) p. 141: Baltimore City: 10-ft concrete shoulder added to Reisterstown Road from Clarks Lane to city line (0.45)

1940: p. 106: Suggested improvements: correction of grade and alignment on US 140 north of Reisterstown

1942: p. 47: Contemplated projects: Reisterstown-Westminster Road over Patapsco River

1944: p. 85: 0.2 mi of US 140 at east end of Westminster widened from 20 to 40 ft

1946: p. 61: proposed bridges: US 140 over Patapsco River (will provide clearance for back water from future Liberty Reservoir) p. 98: Under construction: Westminster Road, bridge over Patapsco River

1948: p. 53: Photo of relocation of US 140 between Reisterstown and Westminster just north of Patapsco bridge p. 120: Each statement starts with completion date: 9/4/47: Reinforced concrete 4-laned road on US 140 from Mt. Pleasant Sanitorium to Finksburg 9/29/47: US 140 bridge over Patapsco

1950: p. 126: (p. 127: start/completed date or percentage done) US 140 concrete dual highway for 3.500 mi from west of Finksburg Road toward Westminster (st. 1950, 28pc) From endpoint over above toward Westminster for 3.380 mi (st. after 6/30/1950) MD 32-71 through Taneytown widened and resurfacing for 1.575 mi (1948) p. 130: US 140 from Union Mills toward PA line widen and relocate for 4.15 mi completed 1949 MD 32-71 widening Taneytown completed 1948 p. 173: MD 32 from Emmitsburg to PA line for 1.14 mi widened, resurfaced, and vertical curves reduced p. 176: (177): MD 32 Emmitsburg for 1.144 (st. and completed 1949)

1952: p. 136: By end of biennium, US 140 relocation completed from Finksburg toward Westminster for 6.88 mi, including construction of temporary access facilities at the Westminster limit of the projet. Plans ready and contracts let for bypass of Westminster p. 142 (p. 143): US 140 from 0.11 mi S of Big Pipe Creek to PA line for 4.753 mi resurfaced (1951) US 140 bridge over Silver Run widened from 24' to 44' (not yet started) US 140, MD 32, MD 27, MD 31 in Westminster all widened and resurfaced for 3.231 mi (st. 1952, 10pc) p. 144: US 140 from west of Finksburg toward Westminster (3.500) st. 1949, f. 1951 p. 145: US 140 second section st. 1950, f. 1951 US 140 south of PA line st. and f. 1951 p. 156 (157): US 140 from MD 30 to beginning of dual highway (1.022) widened, resurfaced, and vertical curves modified (st. 1952, 0)

1954: p. iii: Picture of US 140 divided highway looking south toward WMRR grade separation p. 179: Contracts completed: US 140 from MD 30 to beginning of dual highway (1.022) widen, resurface, and modify vertical curves (st. 1952, f. 1953) p. 215: Completed or awarded were following projects: Westminster By-pass from the completed dual highway on US 140 for 4.63 mi to Roop's Mill on MD 32, including bridges over US 140, WMRR, MD 31, and a stream p. 218: Westminster By-pass bridges over WMRR, MD 31, and stream st. 1952 Westminster By-pass dual from west of end of existing dual highway to Roop's Mill: 2.22 mi dual, 1.49 and 0.92 single lane; st. 1952 p. 222: Completed 7/1/1952 to 6/30/1954: Westminster By-pass bridges Resurfacing of Westminster streets from previous report

1956: p. 205: US 140 Connector to Westminster By-pass to original US 140 for 0.68 mi st. 1955

Bridges North Branch Patapsco River: 1946 Gwynns Falls: 1973 I-695: 2002 EB over I-795 ramps: 1985 Piney Creek N of Taneytown: 1997 Meadow Branch just east of MD 832: 1952 MD 27 and Maryland Midland Railway: 2006 Bear Branch: 1964 Big Pipe Creek: 1964 Richardson Road: 1963 Flat Run: 1932 Middle Creek: 1932 Cattail Branch: 1987 Monocacy River: 1925 (being replaced) MD 140 over US 15: 1971 MD 140 over MD 97 (both): 2006 MD 97 over Big Pipe Creek: 1934 MD 97 over Silver Run: 1987 MD 832 over Big Pipe Creek: 1929 MD 832 over Bear Branch: 1932

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History
Until 1979, MD 140 was US 140. Before US 140 was deleted, it was where MD 140 is today. At the divergence of MD 140 and MD 97 northwest of Westminster, the two routes were swapped after the deletion of the U.S. route; MD 97 now follows US 140's old route to Pennsylvania, while MD 140 follows MD 97's original route to Taneytown and US 15. As a result, MD 140 follows the bypass of the original MD 32 between Westminster and Taneytown that was first designated as part of MD 97.

In 1977, plans were made for US 140 to be decommissioned, with the route to be replaced by MD 140 between Baltimore and Westminster, MD 97 between Westminster and the Pennsylvania state line, and PA 97 between the Maryland state line and Gettysburg. This proposal was made in order to eliminate short routes from the U.S. Highway System. The American Association of State Highway and Transportation Officials approved the removal of the US 140 designation on October 28, 1977. At one point, the section between MD 30 in Reisterstown and Westminster was to become a part of MD 9, which would continue northwest to Emmitsburg; MD 140 was to be designated between Baltimore and Reisterstown. US 140 was decommissioned on January 1, 1979 and became MD 140 between Baltimore and Westminster; MD 140 also ran along the former alignment of MD 97 between Westminster and Emmitsburg; MD 97 replaced US 140 between Westminster and the Pennsylvania border.

Junction list
MD 140 is signed north–south from US 1 in Baltimore to MD 30 in Reisterstown and east–west from MD 30 to the Pennsylvania state line.