The capital beltway, a road that encircles Washington, D.C. passing through the suburbs of Maryland and Virginia. It features four of the top 18 most congested interchanges in the US. Not a fun place to drive. (Unfortunately I have to on a semi-regular basis) At least two parts of this loop are under construction at all times, and they've just started a project to "fix" the interchange of I-95 at I-495 and I-395 known as the "Mixing Bowl". This construction will take approximately 12 years to complete, and when finished there will be one stretch of road that's 21 lanes wide. Is this progress?