Originally funded by the Federal-Aid Highway Act of 1956, I-95 is the longest north-south highway in the country and the most used in terms of vehicle miles traveled, according to the Department of Transportation.
However, planning and replanning created the I-95 gap on the New Jersey - Pennsylvania border, and is the last remaining hole in I-95's continuity.
In 2010, officials and planners finally figured out how to complete Ike's vision and hope to have the I-95 gap filled by August. What took so long? Read Robins Meyer's excellent account of a quiet victory for U.S. infrastructure in The Atlantic's After 61 Years, America’s Busiest Highway Is Almost Complete.