Incidentally, why did I-495 and I-270 widening projects get a perfect score? Apparently, it’s because neither involves tax dollars; they have been proposed as public-private partnerships or P3s. Under such a plan, a private company designs, builds and maintains the added lanes like private tolls roads charging hefty sums to users. On Interstate 66 in northern Virginia, rush hour tolls can climb higher than $40 a trip. Somehow, that hefty charge doesn’t register with the Hogan ranking system. Pennies on the gas tax to finance public bonds? That could land you on the bottom of the list because that involves tax dollars. Tolls? The sky is the limit. Never mind that it all comes from pretty much the same pockets — with the P3 adding the expense of corporate profits and without the cost-savings offered by the lower interest rates on government bonds.