After 61 Years, America’s Busiest Highway Is Almost Complete The Atlantic » Interstate 95, the country’s most used highway, will finally run as one continuous road between Miami and Maine by the late summer. The interstate’s infamous “gap” on the Pennsylvania and New Jersey border will be closed, turning I-95 into an unbroken river of concrete more than 1,900 miles long. Michelle2018-01-24T11:02:13-08:00January 20th, 2018|Highways, New Jersey, Pennsylvania|