North of the Gaithersburg area, Interstate 270 passes what urbanized census-designated place in Montgomery County, Maryland?
Interstate 270 (Maryland) Interstate 270 (abbreviated I-270) is a 34.70 mi auxiliary Interstate Highway in the U.S. state of Maryland that travels between I-495 (the Capital Beltway) just north of Bethesda, Montgomery County and I-70 in the city of Frederick in Frederick County. It consists of the 32.60 mi mainline as well as a 2.10 mi 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 Memorial 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 twelve lanes wide and consists of a local-express lane configuration as well as high-occupancy vehicle 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 a 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.
Seat Pleasant, Maryland Seat Pleasant is an incorporated city in Prince George's County, Maryland, United States, immediately east of Washington D.C. The population was 4,542 at the 2010 census. Two state highways run through it — Maryland Route 704 (now called Martin Luther King Highway and previously named George Palmer Highway in honor of banker and community leader George Palmer) and Maryland Route 214 (Central Avenue). The Washington Metro's Blue and Silver Lines are nearby. The Washington Redskins stadium is east of Seat Pleasant, near the Capital Beltway (I-95/495).