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Interstate 270 (I-270) is a 34.7-mile (55.8 km) auxiliary Interstate Highway in the U.S. state of Maryland that travels from I-495 (Capital Beltway) just north of Bethesda in Montgomery County north to I-70 in the city of Frederick in Frederick County. It consists of the 32.6-mile (52.5 km) mainline as well as a 2.1-mile (3.4 km) spur that provides access to and from southbound I-495. I-270 is known as the Washington National Pike, and makes up the easternmost stretch of the Dwight D. Eisenhower Highway. Most of the southern part of the route in Montgomery County passes through suburban areas around Rockville and Gaithersburg that are home to many biotech firms. This portion of I-270 is up to 12 lanes wide and consists of a local–express lane configuration as well as high-occupancy vehicle lanes (HOV lanes) that are in operation during peak travel times. North of the Gaithersburg area, the road continues through the northern part of Montgomery County, passing Germantown and Clarksburg as a six- to eight-lane highway with an HOV lane in the northbound direction only. North of here, I-270 continues through rural areas into Frederick County and toward the city of Frederick as a four-lane freeway. The freeway was built between 1953 and 1960 as the Washington National Pike between Bethesda and Frederick and carried U.S. Route 240 (US 240), which was rerouted off what is now Maryland Route 355 (MD 355) between these two points. With the creation of the Interstate Highway System a few years later, the road was designated as I-70S along with US 240. There were plans to extend I-70S to I-95 in Washington, D.C., on the North Central Freeway from the Capital Beltway; however, they were canceled in the 1970s due to opposition from residents in the freeway's path. The concurrent US 240 designation was removed in 1972 and I-70S became I-270 in 1975. Increasing traffic levels led to a 200−million(equivalentto200-million (equivalent to 200−million(equivalentto430 million in 2020) widening of the road in Montgomery County to its current configuration. Many improvements are slated for I-270, including the widening of the route that would add high-occupancy toll lanes (HOT lanes). (en) L'Interstate 270 (I-270) est une autoroute auxiliaire de 34,70 miles (55,84 km) dans le Maryland. Elle débute à la jonction avec l'I-495 (Capital Beltway) au nord de Bethesda et se dirige vers le nord jusqu'à l'I-70 dans la ville de Frederick. La plupart du segment sud de la route dans le comté de Montgomery passe par des zones suburbaines autour de Rockville et de Gaithersburg. Au nord de Gaithersburg, la route passe par Germantown et . Après ces deux villes, l'I-270 parcourt des zones rurales du comté de Frederick vers la ville de Frederick. (fr) |
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I |
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Dwight D. Eisenhower Highway (en) Washington National Pike (en) |
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Montgomery (en) Frederick (en) |
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former (en) |
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in Gaithersburg (en) in Rockville (en) |
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spur (en) mainline (en) |
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I-270 highlighted in red; I-270 Spur in blue (en) |
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dbr:SPUI Southbound exit and northbound entrance (en) Northbound exit and southbound entrance (en) Southbound exit and northbound entrance from HOV lanes (en) Access to southbound I-495 and access from northbound I-295; exit 38 on I-495 north/east (en) Access to northbound I-270 and access from southbound I-270; exit 2 on I-270 south (en) Continuation beyond I-70 (en) Exit 53A on I-70 (en) Signed as exits 15A and 15B (en) Signed as exits 16A and 16B (en) Signed as exits 1A and 1B northbound (en) Signed as exits 6A and 6B (en) Signed as exits 9A and 9B ; exits 1A-B on I-370 (en) Signed as exits 4A and 4B ; northbound exit 4A also serves Tower Oaks Boulevard (en) Quince Orchard Road not signed northbound; no direct access from northbound MD 124 to southbound I-270 or from northbound I-270 to southbound MD 124 (en) Signed as exits 31A and 31B ; Market Street not signed southbound (en) Access to eastbound I-495 and access from westbound I-495; exit 35 on I-495 west/south; MD 355 is I-495 exit 34 (en) Northbound exit and southbound entrance; signed as exits 13A and 13B (en) |
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Democracy Boulevard (en) Middlebrook Road (en) Shady Grove Road / Redland Boulevard (en) Watkins Mill Road (en) Westlake Terrace to Fernwood Road (en) |
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270 (xsd:integer) 70.0 |
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I (en) |
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MD (en) |
| dbp:terminusA |
in Bethesda (en) |
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in Frederick (en) |
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I (en) incomplete (en) I 1957 (en) hov (en) I-Spur (en) |
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| rdfs:comment |
L'Interstate 270 (I-270) est une autoroute auxiliaire de 34,70 miles (55,84 km) dans le Maryland. Elle débute à la jonction avec l'I-495 (Capital Beltway) au nord de Bethesda et se dirige vers le nord jusqu'à l'I-70 dans la ville de Frederick. La plupart du segment sud de la route dans le comté de Montgomery passe par des zones suburbaines autour de Rockville et de Gaithersburg. Au nord de Gaithersburg, la route passe par Germantown et . Après ces deux villes, l'I-270 parcourt des zones rurales du comté de Frederick vers la ville de Frederick. (fr) Interstate 270 (I-270) is a 34.7-mile (55.8 km) auxiliary Interstate Highway in the U.S. state of Maryland that travels from I-495 (Capital Beltway) just north of Bethesda in Montgomery County north to I-70 in the city of Frederick in Frederick County. It consists of the 32.6-mile (52.5 km) mainline as well as a 2.1-mile (3.4 km) spur that provides access to and from southbound I-495. I-270 is known as the Washington National Pike, and makes up the easternmost stretch of the Dwight D. Eisenhower Highway. Most of the southern part of the route in Montgomery County passes through suburban areas around Rockville and Gaithersburg that are home to many biotech firms. This portion of I-270 is up to 12 lanes wide and consists of a local–express lane configuration as well as high-occupancy vehicle (en) |
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Interstate 270 (Maryland) (fr) Interstate 270 (Maryland) (en) |
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