Cabin John Parkway | |
|---|---|
 Cabin John Parkway highlighted in red | |
| Route information | |
| Maintained byMDSHA | |
| Length | 1.50 mi[1] (2.41 km) |
| Existed | 1965–present |
| Component highways | I-495X (unsigned) entire length |
| Restrictions | No trucks |
| Major junctions | |
| South end | Clara Barton Parkway inCabin John |
| North end |   I-495 /MD 190 inBethesda |
| Location | |
| Country | United States |
| State | Maryland |
| Counties | Montgomery |
| Highway system | |
TheCabin John Parkway is ancontrolled-accessparkway in the U.S. state ofMaryland. The parkway runs 1.50 miles (2.41 km) from theClara Barton Parkway inCabin John north toInterstate 495 (I-495) inBethesda in southwesternMontgomery County. Cabin John Parkway is a four-lanefreeway that serves as a connector between the Clara Barton Parkway in the direction ofWashington, D.C., and I-495 in the direction ofRockville andSilver Spring. The parkway was constructed in the mid-1960s and passes under the historicUnion Arch Bridge, the longest masonry arch span in America.
_from_the_overpass_for_MacArthur_Boulevard_on_the_edge_of_Cabin_John_and_Bethesda_in_Montgomery_County%2c_Maryland.jpg)
The Cabin John Parkway begins at a partial interchange with the Clara Barton Parkway in theunincorporated area of Cabin John. The interchange allows access from the Cabin John Parkway to the Clara Barton Parkway eastbound and from the Clara Barton Parkway westbound to the Cabin John Parkway. Each direction of the parkway crossesCabin John Creek before the roadways come together to pass under the Union Arch Bridge, which carries theWashington Aqueduct andMacArthur Boulevard. The Cabin John Parkway crosses Cabin John Creek again before continuing north as a four-lanefreeway with a speed limit of 55 mph (89 km/h) through a forested corridor paralleling the creek. After crossing Booze Creek, the two directions of the parkway divide toward their terminuses 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 withMaryland Route 190 (MD 190; River Road). The southbound parkway is formed by ramps from southbound I-495 and MD 190.[1][2]
The Cabin John Parkway is maintained by theMaryland State Highway Administration and has an internal designation ofInterstate 495X (I-495X). Trucks are prohibited on the parkway.[1] The Cabin John Parkway is a part of theNational Highway System as a principal arterial for its entire length.[1][3]
_just_northwest_of_MacArthur_Boulevard_in_Bethesda%2c_Montgomery_County%2c_Maryland.jpg)
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]
The entire parkway is inMontgomery County. All exits are unnumbered.
| Location | mi[1] | km | Destinations | Notes | |
|---|---|---|---|---|---|
| Cabin John | 0.00 | 0.00 | Clara Barton Parkway east –Glen Echo,Washington | Southern terminus; one-way peak-direction road during rush hours | |
| Bethesda | 1.28 | 2.06 | MD 190 (River Road) –Potomac,Washington | Northbound exit and southbound entrance | |
| 1.50 | 2.41 |  I-495 north (Capital Beltway) –Silver Spring | Northern terminus; exit 40 on I-495 | ||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | |||||
