Interstate 465

From IndianaWiki

Interstate 465 is the beltway around Indianapolis. Roughly 53 miles long, it is the main corridor for travel around the center of the state. It intersects with Interstate 69 on the northeast corner, Interstate 65 on the northwest and southeast corners, Interstate 70 on the southwest corner and in the middle of the eastern leg, and Indiana State Road 37 in the middle of southern leg. Almost all high-speed travel in central Indiana is directed on one of these roads.