Piedmont Publius and I have established that buses ride around virtually empty in spite of local governments’ intentions to buy more buses with proceeds from the federal deficit.

Meanwhile, I was reading in Aviation Week & Space Technology that 25% of flights are delayed. Backups at airports have caused the federal government to propose slot auctions, flight caps, and congestion pricing.

The airline industry maintains that the fault lies with the government for not keeping up with growth to provide a national airspace system of sufficient capacity.

And so, it would seem anybody more interested in minimizing adverse consequences of carbon fuel combustion than, say, log rolling, would not limit the supply of one very popular multi-passenger mode of transportation and run an unpopular mode around empty.