I disagree with your forecast “U.S. Road Crisis.” Your forecast is based on extrapolation of current trends, rather like the forecasts that housing prices would rise forever. Increasing highway congestion depends primarily on increasing travel primarily by private automobile. Rising fuel costs are pinching drivers, to the extent that here in Minnesota total vehicle miles have actually been flat for the last three years (I’ll send you a link to the story as soon as I find it). A very good argument can be made that worldwide petroleum production peaked in 2006, and an even better argument can be made that biofuels will have no measurable role in reducing US dependence on petroleum, domestic or imported. Rising fuel prices, coupled with economic recession, will cause drivers to limit discretionary driving, lessen the frequency of non-essential shopping (fewer trips to the mall and to restaurants), encourage car pooling, encourage people to move closer to their places of employment (not all at once, but as people change apartments, etc.) or take jobs closer to home, and to take the bus or train where available. I really doubt that the US automobile fleet will turn over to more efficient vehicles very quickly, as a lot of people bought big new vehicles with home equity loans in the past few years, and are now saddled with inefficient vehicles, no credit to buy new vehicles, and no cash. Regardless of how much Americans cut back on driving, petroleum prices will continue to rise on demand from developing nations. I think US automobile use peaked with peak oil, and I expect that total vehicle miles will continue to decline over the next years. This in turn will eliminate the need for additional highway capacity.