California is exploring the possibility of a voluntary Vehicle Miles Traveled (VMT) Tax to help make up for the shortfall in highway funding that is derived from the increase in vehicle fuel efficiency.
Credit our sorely missed EIC/Editor Emeritus Ed Niedermeyer for being well ahead of the curve. Back in 2011, Ed told me about how the rise of fuel efficient vehicles would create a revenue shortfall for the federal Highway Trust Fund, and that would lead the government to look at implementing all sorts of unpleasant things like a Vehicle Miles Traveled tax. Guess what Ray LaHood is proposing? You guessed it.