Cabin John Parkway

	Union Arch Bridge
	U.S. National Register of Historic Places
	Union Arch Bridge in 2008. The Cabin John Parkway is seen running underneath the bridge.
Location	Cabin John, Maryland
Coordinates	38°58′22.28″N 77°8′52.69″W / 38.9728556°N 77.1479694°WCoordinates: 38°58′22.28″N 77°8′52.69″W / 38.9728556°N 77.1479694°W
Built	1857–1864
Architect	Meigs, Montgomery C.
NRHP reference No.	73000932
Added to NRHP	February 28, 1973; 48 years ago

Cabin John Parkway
Cabin John Parkway
	Cabin John Parkway highlighted in red
Route information
	Maintained by MDSHA
Length	1.50 mi (2.41 km)
Existed	1965–present
Restrictions	No commercial vehicles
Major junctions
South end	Clara Barton Parkway in Cabin John
North end	I-495 in Bethesda
Location
Counties	Montgomery
Highway system
	Maryland highway system; Interstate; US; State; Scenic Byways;

Cabin John Parkway is an automobile parkway in the U.S. state of Maryland. The parkway runs 1.50 miles (2.41 km) from Clara Barton Parkway in Cabin John north to Interstate 495 (I-495) in Bethesda in southwestern Montgomery County. Cabin John Parkway is a four-lane freeway that serves as a connector between Clara Barton Parkway in the direction of Washington and I-495 in the direction of Rockville and Silver Spring. The parkway was constructed in the mid-1960s and passes under the historic Union Arch Bridge, the longest masonry arch span in America.

Route description[]

View south at the north end of the Cabin John Parkway

Cabin John Parkway begins at a partial interchange with Clara Barton Parkway in the unincorporated area of Cabin John. The interchange allows access from southbound Cabin John Parkway to eastbound Clara Barton Parkway and from westbound Clara Barton Parkway to northbound Cabin John Parkway. Each direction of the parkway crosses Cabin John Creek before the roadways come together to pass under the Union Arch Bridge, which carries the Washington Aqueduct and MacArthur Boulevard. Cabin John Parkway crosses Cabin John Creek again before continuing north as a four-lane freeway with a speed limit of 55 miles per hour (89 km/h) through a forested corridor paralleling the creek. After crossing Booze Creek, the two directions of the parkway divide toward their termini at I-495 (Capital Beltway) in Bethesda. The northbound direction of the Cabin John Parkway splits into single-lane ramps for northbound I-495 and I-495's interchange with MD 190 (River Road). The southbound parkway is formed by ramps from southbound I-495 and MD 190.^[1]^[2]

Cabin John Parkway is maintained by the Maryland State Highway Administration and has an internal designation of I-495X. Trucks are prohibited on the parkway.^[1] Cabin John Parkway is a part of the National Highway System as a principal arterial for its entire length.^[1]^[3]

History[]

View north along the Cabin John Parkway near the Clara Barton Parkway

Construction on Cabin John Parkway began in 1962 when I-495's bridge across Cabin John Creek and the southbound ramp to the parkway was built.^[4] Work on the remainder of the parkway was underway by 1963.^[5] Cabin John Parkway opened in 1965 when the Clara Barton Parkway (then known as the Maryland portion of the George Washington Parkway) from the Cabin John interchange east to the MacArthur Boulevard interchange opened.^[6]

Exit list[]

The entire parkway is in Montgomery County. All exits are unnumbered.

Location	mi^[1]	km	Destinations	Notes
Cabin John	0.00	0.00	Clara Barton Parkway east – Glen Echo, Washington	One-way peak-direction road during rush hours
Bethesda	1.28	2.06	MD 190 (River Road) – Potomac, Washington	Northbound exit and southbound entrance; other movements via I-495 exit 39
Bethesda	1.50	2.41	I-495 north (Capital Beltway) – Silver Spring	Exit 40 on I-495
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Incomplete access

References[]

^ ^a ^b ^c ^d ^e
Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved 2013-09-08.
- Montgomery County (PDF).
^ Google (2010-05-19). "Cabin John Parkway" (Map). Google Maps. Google. Retrieved 2010-05-19.
^ National Highway System: Washington, DC-VA-MD (PDF) (Map). Federal Highway Administration. October 1, 2012. Retrieved 2015-05-16.
^ Federal Highway Administration (2012). "NBI Structure Number: 100000150108010". National Bridge Inventory. Federal Highway Administration.
^ Maryland State Roads Commission (1963). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission.
^ Maryland State Roads Commission (1965). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission.
^ "National Register Information System". National Register of Historic Places. National Park Service. 2010-07-10. Listed as "Cabin John Aqueduct."

External links[]

Route map:

( • help)

[Maryland_HLR-1] Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved 2013-09-08.
Montgomery County (PDF).

[2] Montgomery County (PDF).

[Google_Maps_Cabin_John_Parkway-2] Google (2010-05-19). "Cabin John Parkway" (Map). Google Maps. Google. Retrieved 2010-05-19.

[National_Highway_System-3] National Highway System: Washington, DC-VA-MD (PDF) (Map). Federal Highway Administration. October 1, 2012. Retrieved 2015-05-16.

[NBI_Beltway-4] Federal Highway Administration (2012). "NBI Structure Number: 100000150108010". National Bridge Inventory. Federal Highway Administration.

[1963_map-5] Maryland State Roads Commission (1963). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission.

[1965_map-6] Maryland State Roads Commission (1965). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission.

[nris-7] "National Register Information System". National Register of Historic Places. National Park Service. 2010-07-10. Listed as "Cabin John Aqueduct."

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Cabin John Parkway

Contents

Route description[]

History[]

Exit list[]

See also[]

References[]

External links[]