Interstate 465 (I-465)'s the beltway circling Indianapolis, Indiana, United States. It's roughly rectangular in shape and has a perimeter of approximately 53 miles (85 km). It lies almost completely within the boundaries of Marion County, except for two short sections on the north end in Boone and Hamilton Counties. It crosses I-65, I-69, I-70 and I-74, and provides additional access to I-65 via I-865. An $800 million project's underway to refurbish the western edge of the loop, with an estimat… (More on I-465)