Maryland Route 650
Maryland Route 650 highlighted in red
Route information
Maintained byMDSHA
Length	25.89 mi[1] (41.67 km)
Existed	1939–present
Major junctions
South end	New Hampshire Avenue at theDistrict of Columbia boundary inTakoma Park
Major intersections	MD 410 in Takoma Park MD 193 inLangley Park I-495 inHillandale US 29 inWhite Oak Randolph Road inColesville MD 200 Toll in Colesville MD 198 inSpencerville MD 108 inAshton MD 97 inSunshine
North end	MD 108 inEtchison
Location
Country	United States
State	Maryland
Counties	Prince George's,Montgomery
Highway system
Maryland highway system Interstate US State Scenic Byways
←MD 648 →MD 652

Maryland Route 650 (MD 650) is astate highway in theU.S. state ofMaryland. Known as New Hampshire Avenue for most of its length, the state highway runs 25.89 mi (41.67 km) fromEastern Avenue at theWashington, D.C. border north toMD 108 inEtchison. MD 650 serves as a major north-south commuter route in northwesternPrince George's County and easternMontgomery County, connecting the District of Columbia with the residential suburbs ofTakoma Park,Langley Park,Adelphi,Hillandale,White Oak, andColesville. By contrast, the part of MD 650 north ofSpencerville is a quiet rural road connecting several small communities along the northeastern fringe of Montgomery County.

MD 650 was originally built between Takoma Park and Adelphi in the late 1930s as an extension ofNew Hampshire Avenue out of Washington. In the 1950s, the state highway was extended north, taking over portions ofMD 320 andU.S. Route 29 (US 29) and all of MD 116. Beginning in the 1950s and continuing through the 1990s, MD 650 has been expanded to a multi-lanedivided highway in stages from its southern terminus north to Spencerville.

MD 650 is a part of theNational Highway System as a principal arterial from its southern terminus north to MD 108 in Ashton.^[1][2]

MD 650 begins atEastern Avenue on the border ofWashington, D.C.New Hampshire Avenue continues south into the District of Columbia. MD 650 heads northeast as a six-lane divided highway lined with shopping centers. The state highway straddles the border between Prince George's County on the east and Montgomery County on the west, as well as the eastern border of the city ofTakoma Park. MD 650 intersects Poplar Avenue and Ray Road, which were formerly MD 204, before the present state highway meetsMD 410, which heads west as Ethan Allen Avenue and east as East–West Highway. After crossing MD 410, MD 650 fully enters both Takoma Park and Montgomery County. The state highway heads into a forested area with some residences, where it intersectsSligo Creek Parkway and theSligo Creek Trail on a bridge crossingSligo Creek. MD 650 continues into an area of apartment buildings and single family residences, then passes between a couple of shopping centers before intersectingMD 193 (University Boulevard) in Langley Park, where theTakoma Langley Crossroads Transit Center is located at the northwest corner of the intersection.^[1][3]

MD 650 continues north into Prince George's County for the second time. After passing more shopping centers and apartment complexes, the state highway crossesNorthwest Branch and then immediately meets MD 320 at its eastern terminus. Further north, the highway enters Adelphi. MD 650 continues through apartment complexes and passes Metzerott Road on the east and Northampton Drive on the west, where the route enters Montgomery County for good. The state highway heads past residences on service roads and intersects Adelphi Road, which heads toward theUniversity of Maryland. MD 650 meetsInterstate 495 (Capital Beltway) at acloverleaf interchange in Hillandale. After passing a shopping center on the right, the state highway reaches an intersection with the formerNational Labor College on the west and Powder Mill Road, which heads east towardMD 212.^[1][3] MD 650 turns northwest through residential areas in White Oak. The northbound direction gains a fourth lane ahead of passing the formerNaval Ordnance Laboratory campus to the east, which is now the White Oak Federal Research Center occupied by theFood and Drug Administration. After passing the federal research center, MD 650 enters a commercial area and intersects Lockwood Drive, which was formerly MD 895, before it meets US 29 at apartial cloverleaf interchange.^[1][3]

MD 650 reduces to three lanes northbound beyond US 29. The stretch of road north of US 29 includes the first official infrastructure repair project started under theAmerican Recovery and Reinvestment Act of 2009, a repaving job and sidewalk improvements between Milestone Drive and Venice Drive.^[4] MD 650 then enters a commercial area in Colesville, where the highway intersectsRandolph Road. MD 650 continues through residential areas north of Colesville. The state highway comes to asingle-point urban interchange withMD 200 (Intercounty Connector), where it intersects the eastern terminus of a section of theICC Trail, after which the road slims down to a four-lane divided highway ahead of the intersection with Good Hope Road and Bonifant Road. MD 650 then entersCloverly, which features intersections with Norwood Road, which leads west toMD 182, and Briggs Chaney Road, which leads east back to US 29. After leaving Cloverly, the state highway continues through a forested area with scattered subdivisions before reaching the intersection ofMD 198 (Spencerville Road) and Norbeck Road, which leads west toMD 28.^[1][3]

North of Spencerville, MD 650 becomes a two-lane road, passing several churches, subdivisions, and the Hampshire Greens Golf Course to the west. The state highway passes through the hamlet ofEdnor, where it intersects Ednor Road and passes by the historic homeClifton. After Ednor Road, MD 650 continues through forested areas with scattered residential subdivisions. The state highway then reaches the community ofAshton. MD 650 meetsMD 108, which is named Olney Sandy Spring Road headed west and Ashton Road headed east at an intersection surrounded by a few small shopping centers.^[1][3]

MD 650 turns north and heads through a mix of farms and scattered residences on large lots. After passing through the hamlet ofBrinklow, the state highway turns to the northwest as it crosses theHawlings River. MD 650 intersectsBrighton Dam Road, which heads west towardBrookeville. After passing several subdivisions of large houses and under some transmission lines, MD 650 enters the hamlet ofSunshine, where the road intersectsMD 97 (Georgia Avenue). After crossing MD 97, MD 650 changes its name to Damascus Road. The next hamlet isUnity, where Sundown Road splits to the west towardLaytonsville. After leaving Unity, the state highway continues northwest through scattered subdivisions and farmland. MD 650 enters the unincorporated community ofEtchison, where the state highway reaches its northern terminus at its second meeting with MD 108. MD 108 heads south and east toward Laytonsville as Laytonsville Road, while that state highway takes over Damascus Road towardDamascus.^[1][3]

Maryland Route 116
Location	Ashton–Brinklow
Existed	1928–1960

MD 650 began as a continuation of New Hampshire Avenue out of Washington. The state highway was planned by 1935 roughly following Sligo Mill Road to the site of the defunct mill at the current intersection with Sligo Creek Parkway, then east to near the intersection of MD 193 and MD 212 in Langley Park.^[5] By 1939, MD 650 was complete between Eastern Avenue and MD 193, but along its present alignment.^[6] The segment between MD 193 and MD 320 had also started construction, which was complete by 1946.^[7]

The remainder of the current alignment resulted from MD 650 taking over parts of three other routes between 1955 and 1960: MD 320, US 29, and MD 116 (Damascus Road).^[8] MD 320 continued north from its eastern terminus to the current intersection with Lockwood Drive in White Oak.^[8] From there, US 29 used Colesville Road through the namesake village up to Ashton, where the federal highway used the route of present-day MD 108 east toEllicott City.^[8] MD 116 continued north and west to the present northern terminus of MD 650. MD 116 originally only went from Ashton north toBrighton in 1930, but the former state highway was extended north to Sunshine in 1949 and Etchison in 1956.^[9][10][11]

MD 650 assumed MD 320's route north to White Oak in 1955.^[11] The next year, the original portion of MD 650 was rebuilt as a multi-lane divided highway.^[11] In 1960, MD 650 took over the old route of US 29 between White Oak and Ashton when US 29 was shifted to the new Columbia Pike, then took over all of MD 116.^[12] The divided highway was extended to White Oak in the 1960s, to Colesville in the 1970s, and to Spencerville in the 1990s.^[13][14][15]

County	Location	mi [1]	km	Destinations	Notes
Prince George's	Takoma Park	0.00	0.00	New Hampshire Avenue south /Eastern Avenue –Washington	District of Columbia boundary; southern terminus
		0.81	1.30	MD 410 (East–West Highway/Ethan Allen Avenue) –Hyattsville,Takoma Park
Montgomery		1.24	2.00	Sligo Creek Parkway west	Eastern terminus of Sligo Creek Parkway
Prince George's	Langley Park	1.85	2.98	MD 193 (University Boulevard) –College Park,Silver Spring
	Adelphi	2.78	4.47	MD 320 south (Piney Branch Road) –Silver Spring	Northern terminus of MD 320
Montgomery	Hillandale	4.04	6.50	I-495 (Capital Beltway) toI-95 –Northern Virginia,Silver Spring,Baltimore,College Park	I-495 Exit 28
	White Oak	5.97	9.61	US 29 (Columbia Pike) –Silver Spring,Columbia	Partial cloverleaf interchange
	Colesville	8.34	13.42	Randolph Road –Glenmont,Calverton
		9.24	14.87	MD 200 Toll (Intercounty Connector) toI-95 /I-270	MD 200 Exit 13;single-point urban interchange;E-ZPass orVideo Tolling
	Spencerville	11.81	19.01	MD 198 east (Spencerville Road) / Norbeck Road west –Burtonsville,Norbeck	Western terminus of MD 198
	Ashton	14.31	23.03	MD 108 (Olney Sandy Spring Road/Ashton Road) –Olney,Clarksville
	Sunshine	20.66	33.25	MD 97 (Georgia Avenue) –Brookeville,Cooksville
	Etchison	25.89	41.67	MD 108 (Laytonsville Road/Damascus Road) –Laytonsville,Damascus	Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Electronic toll collection

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