Interstate System Almost Complete

…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. In so doing, it will also mark a larger milestone, say transportation officials—the completion of the original United States interstate system.…