Interstate 270 is the beltway loop freeway in the Columbus

Columbus, Ohio

Columbus is the capital of and the largest city in the U.S. state of Ohio. The broader metropolitan area encompasses several counties and is the third largest in Ohio behind those of Cleveland and Cincinnati. Columbus is the third largest city in the American Midwest, and the fifteenth largest city...

 metropolitan area, commonly known locally as "The Outerbelt," or the "Jack Nicklaus Freeway." The "western" (and "eastern") terminus of I-270, at least in terms of the zero-milepost, is at the junction with I-71 east of Grove City, Ohio

Grove City, Ohio

As of the census of 2000, there were 27,075 people, 10,265 households, and 7,544 families residing in the city. The population density was 1,941.2 people per square mile . There were 10,712 housing units at an average density of 768.0 per square mile...

. I-270, along with I-670

Interstate 670 (Ohio)

Interstate 670 is an Interstate Highway in the U.S. state of Ohio that passes through downtown Columbus, connecting I-70 west of downtown with I-270 and US 62 near the eastern suburb of Gahanna. I-670 provides access to Port Columbus International Airport, and intersects SR 315 and I-71 downtown...

, provides access to Port Columbus International Airport

Port Columbus International Airport

Port Columbus International Airport , commonly shortened to Port Columbus, is a Class C international airport located east of downtown Columbus, Ohio, USA. It is managed by the Columbus Regional Airport Authority, which also oversees operations at Rickenbacker International Airport and Bolton Field...

. The entire length of I-270 is 54.97 miles (88.5 km).
Planning for an outerbelt around Columbus began in the late 1950s.