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{{Short description|State highway in Howard and Anne Arundel Counties, Maryland, U.S.}}
{{Use American English|date=April 2025}}
{{Use mdy dates|date=January 2025}}
{{Infobox road
|state=MD
|type=MD
|route=175
|map_alt=
|map={{maplink-road}}
|map_custom=yes
|map_notes=Maryland Route 175 highlighted in red
|length_mi=17.01
|length_round=2
|length_ref=<ref name="Maryland HLR"/>
|established=1927
|direction_a=West
|terminus_a=Little Patuxent Parkway in [[Columbia, Maryland|Columbia]]
|junction=
*{{jct|state=MD|US|29}} in Columbia
*{{jct|state=MD|MD|108}} in Columbia
*{{jct|state=MD|I|95}} near Columbia
*{{jct|state=MD|US|1}} near [[Jessup, Maryland|Jessup]]
*{{jct|state=MD|MD|295}} in Jessup
*{{jct|state=MD|MD|713}} near [[Fort Meade, Maryland|Fort Meade]]
*{{jct|state=MD|MD|32}} near [[Odenton, Maryland|Odenton]]
*{{jct|state=MD|MD|170}} in Odenton
|direction_b=East
|terminus_b={{jct|state=MD|MD|3}} in [[Millersville, Maryland|Millersville]]
|counties=[[Howard County, Maryland|Howard]], [[Anne Arundel County, Maryland|Anne Arundel]]
|previous_type=MD
|previous_route=174
|next_type=MD
|next_route=176
|browse=
}}
'''Maryland Route 175''' is a [[state highway]] in the U.S. state of [[Maryland]]. The highway runs {{convert|17.01|mi|km}} from Little Patuxent Parkway in [[Columbia, Maryland|Columbia]] east to [[Maryland Route 3|MD 3]] in [[Millersville, Maryland|Millersville]]. MD 175 is a major highway through the large [[Unincorporated area|unincorporated community]] of Columbia; the highway connects [[U.S. Route 29 in Maryland|U.S. Route 29]] (US 29) next to [[Town Center, Columbia, Maryland|Columbia Town Center]] with [[Interstate 95 in Maryland|Interstate 95]] (I-95) and an industrial area on the eastern side of [[Howard County, Maryland|Howard County]]. MD 175 also connects [[Fort Meade]] with [[Jessup, Maryland|Jessup]] and [[Odenton, Maryland|Odenton]] in western [[Anne Arundel County, Maryland|Anne Arundel County]], where it links [[Maryland Route 295|MD 295]] and [[Maryland Route 32|MD 32]] with the eastern part of the [[U.S. Army]] base.
MD 175 was constructed from [[Ellicott City, Maryland|Ellicott City]] to Millersville in the late 1920s and early 1930s as part of three routes: [[Maryland Route 531 (1933–1946)|MD 531]] from [[Maryland Route 103|MD 103]] near Ellicott City to [[U.S. Route 1 in Maryland|US 1]] near Jessup, MD 175 from there to Fort Meade and north to [[Hanover, Maryland|Hanover]], and MD 180 from Odenton to Millersville. The highway did not originally extend through Fort Meade; MD 175 was constructed through the military installation in the early 1940s as part of major upgrades to the highway from Jessup to Odenton due to its strategic importance. By 1946, MD 175 extended from Ellicott City to Millersville. The highway was widened from Odenton to Millersville in the late 1940s and from Ellicott City to Odenton in the mid-1950s. MD 175 was relocated at I-95 around 1970 and as a major highway through the newly constructed community of Columbia in the mid-1970s. The old portion of the highway from Ellicott City to the new highway became [[Maryland Route 108|MD 108]] and [[Maryland Route 104|MD 104]]. There are plans to expand MD 175 to a multi-lane [[divided highway]] through Fort Meade due to increased activity at the Army post.
==Route description==
[[File:2020-06-22 12 37 49 View west along Maryland State Route 175 (Annapolis Road) from the overpass for Maryland State Route 32 (Patuxent Freeway) on the edge of Fort Meade and Odenton in Anne Arundel County, Maryland.jpg|thumb|left|View west along MD 175 from MD 32 near Fort Meade]]
MD 175 begins just west of its bridges over the [[Little Patuxent River]]. The highway continues southwest as Little Patuxent Parkway, the county-maintained six-lane divided highway that forms the main street of Columbia Town Center. MD 175 heads east as Rouse Parkway, a four-lane divided [[limited-access highway]]; the highway was renamed from Little Patuxent Parkway to honor Columbia founder [[James Rouse]] and his wife Patty in 2006.<ref name="Rouse Parkway"/> The highway immediately has a [[cloverleaf interchange]] with US 29 (Columbia Pike). MD 175 heads southeast through intersections with Thunder Hill Road, Oakland Mills Road, Tamar Drive, and Dobbin Road as it passes between the Columbia villages of [[Oakland Mills, Columbia, Maryland|Oakland Mills]] to the southwest and [[Long Reach, Columbia, Maryland|Long Reach]] to the northeast. The state highway expands to six lanes at Dobbin Road and has a [[partial cloverleaf interchange]] with Snowden River Parkway that provides access to a [[park and ride]] lot serving [[MTA Maryland]] commuter buses and a [[trumpet interchange]] with Columbia Gateway Drive. Access from eastbound MD 175 to Columbia Gateway Drive requires using the Snowden River Parkway interchange. MD 175 widens to eight lanes at Columbia Gateway Drive, a width the highway carries through its intersection with the eastern end of MD 108 (Waterloo Road) to the highway's partial cloverleaf interchange with I-95. The highway's name changes from Rouse Parkway to Waterloo Road at the MD 108 junction. MD 175 has six lanes from I-95 to east of its junction with US 1 (Washington Boulevard), which was the site of a tavern called Waterloo and before that [[Spurrier's Tavern]].<ref name="Maryland HLR"/><ref name="Google Maps MD 175"/>
[[File:2020-06-22 13 13 59 View east along Maryland State Route 175 (Annapolis Road) at Maryland State Route 713 (Ridge Road-Rockenback Road) on the edge of Fort Meade and Severn in Anne Arundel County, Maryland.jpg|thumb|right|View east along MD 175 at MD 713 near Fort Meade]]
MD 175 narrows to a two-lane undivided road as it passes between the Maryland Wholesale Produce Distribution Center to the southwest and the [[Patuxent Institution]] on the northeast and enters Jessup. East of Dorsey Run Road, which leads to the Jessup Auto Distribution Center, the state highway crosses over [[CSX Transportation|CSX]]'s [[Capital Subdivision]] railroad line and enters Anne Arundel County, where the highway's name changes to Jessup Road. East of the tracks, MD 175 meets the eastern end of [[unsigned highway|unsigned]] [[Maryland Route 723|MD 723]] (Old Jessup Road), which accesses the [[Jessup station]] on [[MARC Train|MARC]]'s [[Camden Line]], which uses the Capital Subdivision tracks. The highway continues east past the former [[Maryland House of Correction]] and has a cloverleaf interchange with MD 295 (Baltimore–Washington Parkway), where the highway's name becomes Annapolis Road. MD 175 temporarily expands to four lanes at its intersection with MD 713, which heads south as Rockenbach Road into Fort Meade and north as Ridge Road toward Hanover. The highway passes through the eastern part of Fort Meade and expands to a four-lane road with a [[center left-turn lane]] at Reece Road, which becomes [[Maryland Route 174|MD 174]] on the eastern boundary of the military installation.<ref name="Maryland HLR"/><ref name="Google Maps MD 175"/>
At the southeastern corner of the fort, MD 175 has a partial cloverleaf interchange with MD 32 (Patuxent Freeway) and enters Odenton. The highway crosses over [[Amtrak]]'s [[Northeast Corridor]] railroad line and meets the southern end of MD 170 (Telegraph Road); the south leg of the intersection, Piney Orchard Parkway, leads to the [[Odenton station]] on MARC's [[Penn Line]], which uses the Amtrak tracks. MD 175 continues as a four-lane undivided highway to a five-legged [[roundabout]] at the eastern end of Odenton where the highway meets Odenton Road, Higgins Drive, and Sappington Station Road, which is unsigned MD 32AA. The highway continues as a two-lane undivided road to the northeast of [[Arundel High School]] and through the village of [[Gambrills, Maryland|Gambrills]] before reaching its eastern terminus at MD 3 (Robert Crain Highway) west of Millersville. MD 175 has separate intersections with southbound and northbound MD 3; Millersville Road continues east from the northbound intersection through the eponymous village and past the historic [[Childs Residence]].<ref name="Maryland HLR"/><ref name="Google Maps MD 175"/>
MD 175 is a part of the [[National Highway System (United States)|National Highway System]] as an [[intermodal freight transport]] connector from I-95 to Dorsey Run Road in Jessup and as a principal arterial from US 29 to I-95 through Columbia.<ref name="Maryland HLR"/><ref name="National Highway System"/>
==History==
{{infobox road small
|state=MD
|type=MD
|route=180
|___location=[[Odenton, Maryland|Odenton]]–[[Millersville, Maryland|Millersville]]
|length_mi=
|length_ref=
|length_round=2
|formed=1930
|deleted={{circa|1946}}
}}
The first section of MD 175 was constructed between 1924 and 1926 as a macadam road from US 1 southeast to the entrance of the Maryland House of Correction east of the [[Baltimore and Ohio Railroad]] (now CSX) in Jessup.<ref name="1926 src report"/><ref name="1927 map"/> MD 175 was extended as a concrete road east to its modern intersection with MD 713, then northeast along what later became MD 713 to [[Maryland Route 176|MD 176]] in Hanover in 1929.<ref name="1930 src report"/><ref name="1930 map"/><ref name="1939 map"/> The easternmost portion of MD 175, which was originally MD 180, was constructed as a concrete road starting in 1930 from MD 3 to the [[Pennsylvania Railroad]] (now Amtrak) in Odenton; the highway was complete west to Gambrills by the end of 1930.<ref name="1930 src report"/><ref name="1930 map"/><ref name="1939 map"/> The original western part of MD 175, from US 1 in Jessup to MD 103 in Ellicott City, was constructed as MD 531 in 1932.<ref name="1939 map"/><ref name="1933 map"/><ref name="1934 src report"/> The portion of the highway through Fort Meade was a public highway maintained by Anne Arundel County or the federal government through [[World War II]].<ref name="1933 map"/><ref name="1940 map"/>
[[File:2020-08-11 18 00 21 View east along Maryland State Route 175 (Rouse Parkway) at Maryland State Route 108 (Waterloo Road) in Columbia, Howard County, Maryland.jpg|thumb|left|MD 175 eastbound approaching I-95 in Columbia]]
MD 180's crossing of the Pennsylvania Railroad was constructed in 1938.<ref name="1938 src report"/><ref name="NBI Amtrak"/> The highway was relocated through Odenton using the new bridge in 1938 and 1939; the old road became MD 677.<ref name="1939 map"/><ref name="1938 src report"/> MD 175's bridge over the Baltimore and Ohio Railroad in Jessup was completed in 1942.<ref name="1942 src report"/><ref name="NBI CSX"/> The highway was widened to a {{convert|24|ft|m|adj=on}} wide road with a concrete base and asphalt surface from Jessup to the MD 713 intersection in 1942.<ref name="1942 src report"/> MD 175 was also extended as a {{convert|24|ft|m|adj=on}} road through Fort Meade from MD 713 to west of Odenton between 1942 and 1944.<ref name="1942 src report"/><ref name="1944 src report"/> By 1946, MD 175 had been extended east over MD 180 to Millersville and west over MD 531 to Ellicott City; the portion of MD 175 from Fort Meade to MD 176 became MD 713.<ref name="1946 map"/> MD 175 was widened from {{convert|16|to|22|ft|m}} from Odenton to Millersville starting in 1948.<ref name="1948 src report"/> The highway was widened and resurfaced from Odenton to the newly constructed Baltimore–Washington Expressway interchange in 1954.<ref name="1954 src report"/> MD 175 was also widened with curve amelioration from US 1 to MD 103 between 1954 and 1956.<ref name="1954 src report"/><ref name="1956 src report"/>
MD 175's first divided highway section was created when the highway was relocated from US 1 to just north of the modern MD 108 intersection in conjunction with the construction of the I-95 interchange in 1969 and 1970.<ref name="1969 map"/><ref name="NBI I-95"/> The state highway's interchange with US 29 in Columbia was built in several stages. The westbound and eastbound bridges across the Little Patuxent River were built in 1970 and 1974, respectively.<ref name="NBI Little Pax WB"/><ref name="NBI Little Pax EB"/> The first parts of the interchange to open were the ramps between county-maintained Little Patuxent Parkway and southbound US 29.<ref name="USGS Savage 1976"/> MD 175's bridges over US 29 were built in 1974.<ref name="NBI US 29"/> The interchange fully opened when the new Little Patuxent Parkway was completed from the existing highway at the present MD 108 interchange west to US 29 in 1977. The portion of MD 175 north of the new highway was replaced by an eastward extension of MD 108 and MD 104. The highway's trumpet interchange with Columbia Gateway Drive opened with Little Patuxent Parkway.<ref name="1977 map"/> MD 175 was two lanes from US 29 to Columbia Gateway Drive until the road was expanded to a divided highway in 1987.<ref name="1987 map"/> The highway's interchange with Snowden River Parkway was constructed in 2001.<ref name="Maryland HLR 2001"/> MD 175's roundabout in Odenton was installed in 2004.<ref name="Maryland HLR 2004"/>
The [[Maryland State Highway Administration]] plans to upgrade MD 175 from MD 295 in Jessup east to MD 170 in Odenton in response to the greatly increased traffic destined for Fort Meade due to the [[Base Realignment and Closure]] process. The state plans to expand MD 175 to a six-lane divided highway along the {{convert|5.2|mi|km|adj=on}} stretch, construct intersection improvements at MD 713, Reece Road, Mapes Road, and Charter Oaks Boulevard, and reconstruct the MD 295 interchange.<ref name="Baltimore Sun BRAC Road Projects"/><ref name="Baltimore Sun Projects Take Shape"/> One of the first projects to begin construction is improvements at the MD 713 intersection, which started in 2011 and were expected to be completed in 2013.<ref name="MDSHA MD 713"/>
==Junction list==
{{jcttop|length_ref=<br><ref name="Maryland HLR"/>}}
{{MDint
|county=Howard
|cspan=8
|___location=Columbia
|lspan=7
|mile=0.00
|road={{jct|state=MD|road|Little Patuxent Parkway|location1=[[Town Center, Columbia, Maryland|Columbia Town Center]]}}
|notes=Western terminus; end of state maintenance
}}
{{MDint
|mile=0.32
|road={{jct|state=MD|US|29|name1=Columbia Pike|city1=Baltimore|location2=[[Washington, D.C.|Washington]]}}
|notes=US 29 Exit 20
}}
{{MDint
|mile=1.40
|road={{jct|state=MD|road|Oakland Mills Road|location1=[[Blandair|Blandair Park]]|location2=[[Oakland Mills, Columbia, Maryland|Oakland Mills]]}}
|type=incomplete
|notes=Eastbound exit and entrance
}}
{{MDint
|mile=3.54
|road={{jct|state=MD|road|Snowden River Parkway / Columbia Gateway Drive|location1=[[Long Reach, Columbia, Maryland|Long Reach]]|location2=[[Owen Brown, Columbia, Maryland|Owen Brown]]}}
|notes=Partial cloverleaf interchange, frontage road to Columbia Gateway
}}
{{MDint
|mile=3.89
|road={{jct|state=MD|road|Columbia Gateway Drive|location1=[[East Columbia Business District, Columbia, Maryland|Columbia Gateway Business Park]]}}
|notes=Trumpet interchange (eastbound only), frontage road westbound
}}
{{MDint
|mile=4.48
|road={{jct|state=MD|MD|108|dir1=west|name1=Waterloo Road|city1=Ellicott City}}
|notes=Eastern terminus of MD 108
}}
{{MDint
|mile=5.19
|road={{jct|state=MD|I|95|city1=Baltimore|location2=[[Washington, D.C.|Washington]]}}
|notes=I-95 Exit 41
}}
{{MDint
|___location=Jessup
|lspan=2
|mile=5.65
|road={{jct|state=MD|US|1|name1=Washington Boulevard|city1=Laurel|city2=Elkridge}}
}}
{{MDint
|county=Anne Arundel
|cspan=7
|mile=8.59
|road={{jct|state=MD|MD|295|name1=Baltimore–Washington Parkway|city1=Baltimore|location2=[[BWI Airport]]|location3=[[Washington, D.C.|Washington]]|extra=airport}}
|notes=Cloverleaf interchange
}}
{{MDint
|___location=Fort Meade
|mile=7.27
|road={{jct|state=MD|MD|713|name1=Ridge Road/Rockenbach Road|city1=Hanover|location2=[[Fort Meade]]}}
}}
{{MDint
|___location=Odenton
|lspan=3
|mile=12.68
|road={{jct|state=MD|MD|32|name1=Patuxent Freeway|city1=Columbia|city2=Annapolis}}
|notes=MD 32 Exit 6
}}
{{MDint
|mile=13.74
|road={{jct|state=MD|MD|170|dir1=north|name1=Telegraph Road|road|Piney Orchard Parkway south|city1=Severn|city2=Piney Orchard}}
|notes=Southern terminus of MD 170
}}
{{MDint
|mile=14.74
|road=Sappington Station Road north / Odenton Road west / Higgins Drive south
|notes=Roundabout; Sappington Station Road is unsigned [[Maryland Route 32|MD 32AA]]
}}
{{MDint
|___location=Millersville
|lspan=2
|mile=16.88
|road={{jct|state=MD|MD|3|dir1=south|name1=Robert Crain Highway|city1=Bowie}}
}}
{{MDint
|mile=17.01
|road={{jct|state=MD|MD|3|I|97|to2=y|dir1=north|name1=Robert Crain Highway|city1=Baltimore}}
|notes=Eastern terminus
}}
{{jctbtm|exit|keys=incomplete}}
==Auxiliary routes==
*MD 175AA is the designation for the {{convert|0.02|mi|km|adj=on}} section of Max Blob Park Road from the intersection of MD 175 and Clark Road south to the portion of Max Blob Park Road designated [[Maryland Route 917|MD 917]] just east of the MD 175–MD 295 interchange in Jessup.<ref name="Maryland HLR"/><ref name="Google Maps MD 175AA"/>
*MD 175HC is the designation for the {{convert|0.37|mi|km|adj=on}} eastbound collector/distributor roadway from Snowden River Parkway east to MD 175's bridge over Columbia Gateway Drive, where MD 175HC merges with eastbound MD 175, in Columbia. The highway allows eastbound MD 175 and Snowden River Parkway traffic to access Columbia Gateway Drive.<ref name="Maryland HLR"/><ref name="Google Maps MD 175HC"/> Prior to the completion of the interchange between MD 175 and Snowden River Parkway, MD 175HC began just east of the intersection of the two roads.<ref name="Maryland HLR 2001"/><ref name="Maryland HLR 2000"/>
==See also==
*{{Portal-inline|Maryland Roads}}
==References==
{{reflist|30em|refs=
<ref name="Maryland HLR">{{Maryland HLR|year=2013|county1=Anne Arundel|county2=Howard|access-date=2012-11-20}}</ref>
<ref name="National Highway System">{{cite map|publisher=Federal Highway Administration|title=National Highway System: Baltimore, MD|url=https://www.fhwa.dot.gov/planning/national_highway_system/nhs_maps/maryland/baltimore_md.pdf|date=October 1, 2012|format=PDF|access-date=2012-12-30}}</ref>
<ref name="Rouse Parkway">{{cite news|last1=Blakely|first1=Andrei|title=Road Renamed After James and Patty Rouse|newspaper=Howard County Times|___location=Ellicott City, MD|publisher=Patuxent Publishing|url=http://archives.explorehoward.com/news/6018031/road-renamed-after-james-patty-rouse/|date=May 11, 2006|access-date=2012-12-29|archive-url=https://archive.today/20130122165205/http://archives.explorehoward.com/news/6018031/road-renamed-after-james-patty-rouse/|archive-date=January 22, 2013|url-status=usurped}}</ref>
<ref name="Google Maps MD 175">{{google maps|url=https://maps.google.com/maps?saddr=Little+Patuxent+Pkwy&daddr=MD-175+W%2FAnnapolis+Rd+to:Annapolis+Rd+to:MD-175+E%2FAnnapolis+Rd&hl=en&sll=39.09916,-76.70517&sspn=0.130288,0.336113&geocode=FV2NVgIdvVJr-w%3BFaUjVQIdoPhs-w%3BFdxBVAIdm-lt-w%3BFWf4UwId7Fdu-w&t=h&mra=ls&z=11|title=Maryland Route 175|access-date=2012-12-29}}</ref>
<ref name="1926 src report">{{Maryland SRC report|year=1926|page=38|access-date=2012-12-29}}</ref>
<ref name="1927 map">{{Maryland road map|year=1927}}</ref>
<ref name="1930 src report">{{Maryland SRC report|year=1930|pages=196–197|access-date=2012-12-29}}</ref>
<ref name="1930 map">{{Maryland road map|year=1930}}</ref>
<ref name="1939 map">{{Maryland road map|year=1939}}</ref>
<ref name="1933 map">{{Maryland road map|year=1933}}</ref>
<ref name="1934 src report">{{Maryland SRC report|year=1934|page=340|access-date=2012-12-29}}</ref>
<ref name="1940 map">{{Maryland road map|year=1940}}</ref>
<ref name="1938 src report">{{Maryland SRC report|year=1938|pages=85, 87|access-date=2012-12-29}}</ref>
<ref name="NBI Amtrak">{{NBI|structurenumber=100000020048010|datakey=271819|access-date=2012-12-29}}</ref>
<ref name="1942 src report">{{Maryland SRC report|year=1942|pages=42–43, 54, 85|access-date=2012-12-29}}</ref>
<ref name="NBI CSX">{{NBI|structurenumber=100000130043010|datakey=273076|access-date=2012-12-29}}</ref>
<ref name="1944 src report">{{Maryland SRC report|year=1944|pages=84–85|access-date=2012-12-29}}</ref>
<ref name="1946 map">{{Maryland road map|year=1946}}</ref>
<ref name="1948 src report">{{Maryland SRC report|year=1948|page=20|access-date=2012-12-29}}</ref>
<ref name="1954 src report">{{Maryland SRC report|year=1954|pages=5, 61, 196, 216|access-date=2012-12-29}}</ref>
<ref name="1956 src report">{{Maryland SRC report|year=1956|page=205|access-date=2012-12-29}}</ref>
<ref name="1969 map">{{Maryland road map|year=1969}}</ref>
<ref name="NBI I-95">{{NBI|structurenumber=100000130061013|datakey=273097|access-date=2012-12-29}}</ref>
<ref name="NBI Little Pax WB">{{NBI|structurenumber=100000130079010|datakey=273118|access-date=2012-12-29}}</ref>
<ref name="NBI Little Pax EB">{{NBI|structurenumber=100000130087010|datakey=273126|access-date=2012-12-29}}</ref>
<ref name="USGS Savage 1976">{{cite map|publisher=United States Geological Survey|title=Savage, MD quadrangle|edition=1976|scale=1:24,000|series=15 Minute Series (Topographic)<!--|access-date=2012-12-29-->}}</ref>
<ref name="NBI US 29">{{NBI|structurenumber=100000130086014|datakey=273125|access-date=2012-12-29}}</ref>
<ref name="1977 map">{{Maryland road map|year=1977}}</ref>
<ref name="1987 map">{{Maryland road map|year=1987}}</ref>
<ref name="Maryland HLR 2001">{{Maryland HLR|year=2001|county1=Howard|access-date=2012-12-29}}</ref>
<ref name="Maryland HLR 2004">{{Maryland HLR|year=2004|county1=Anne Arundel|access-date=2012-12-29}}</ref>
<ref name="Baltimore Sun BRAC Road Projects">{{Cite news|last1=Dresser|first1=Michael|title=Md., Fort Meade Agree on BRAC Road Projects|newspaper=The Baltimore Sun|___location=Baltimore|publisher=Tribune Company|date=October 13, 2010|url=https://www.baltimoresun.com/2010/10/13/md-fort-meade-agree-on-brac-road-projects/|access-date=2012-12-29}}</ref>
<ref name="Baltimore Sun Projects Take Shape">{{cite news|last1=Lamothe|first1=Dan|title=Route 175 Project Plan Takes Shape|newspaper=The Baltimore Sun|___location=Baltimore|publisher=Tribune Company|date=March 28, 2007|url=https://www.baltimoresun.com/2007/03/28/route-175-project-plan-takes-shape/|access-date=2012-12-29}}</ref>
<ref name="MDSHA MD 713">{{cite web|author=Staff|title=Project Information: MD 0175 DORSEY ROAD TC - MD713 (ROCKENBACH RD/RIDGE RD) TO E OF DISNEY RD/26TH ST (BRAC)|publisher=Maryland State Highway Administration|url=http://apps.roads.maryland.gov/WebProjectLifeCycle/ProjectInformation.aspx?projectno=AA580532|access-date=2012-12-29}}</ref>
<ref name="Google Maps MD 175AA">{{google maps|url=https://maps.google.com/maps?saddr=Old+Clark+Rd&daddr=Old+Clark+Rd&hl=en&ll=39.138099,-76.752441&spn=0.004069,0.010504&sll=39.13827,-76.752527&sspn=0.002035,0.005252&geocode=FdEyVQIdUtls-w%3BFZozVQIdQdps-w&t=h&mra=ls&z=17|title=Maryland Route 175AA|access-date=2013-01-01}}</ref>
<ref name="Google Maps MD 175HC">{{google maps|url=https://maps.google.com/maps?saddr=Unknown+road&daddr=Unknown+road&hl=en&ll=39.188893,-76.809304&spn=0.008133,0.021007&sll=39.189308,-76.809433&sspn=0.002033,0.005252&geocode=FSr_VQIdrvFr-w%3BFQ70VQIdmQVs-w&t=h&mra=ls&z=16|title=Maryland Route 175HC|access-date=2013-01-01}}</ref>
<ref name="Maryland HLR 2000">{{Maryland HLR|year=2000|county1=Howard|access-date=2013-01-01}}</ref>
}}
==External links==
{{commons category}}
{{Attached KML|display=title,inline}}
*[http://www.mdroads.com/routes/160-179.html#md175 MDRoads: MD 175]
[[Category:State highways in Maryland|175]]
[[Category:Roads in Howard County, Maryland]]
[[Category:Roads in Anne Arundel County, Maryland]]
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