A few years ago, Alaska’s proposed “Bridge to Nowhere” became a national symbol of wasteful government spending on little-needed projects. Now Virginia Gov. Bob McDonnell (R) has pushed through his own version of this embarrassment, a $1.4 billion highway outside Hampton Roads that qualifies as a “Road for Nobody.” McDonnell has perplexed people across the state by his insistence on adding a tolled, four-lane highway parallel to U.S. 460. It will stretch for 55 miles from Petersburg, a Richmond suburb, southeast to Suffolk. The deal signed in December to build the road is especially insulting to traffic-jammed Northern Virginia, where...