I
don't suppose it has occurred to anyone that the reason this huge saving in oil use only represents 1/4 day of total USA oil use could be because maybe the USA uses too much oil per capita on a day to day basis? No? Nobody over there sees it that way? 
The way I sees it, Joe, is that you guys got buses & trolleys that actually run on time. AND, if you miss the bus, you can call the missus, apologize, & then amble over to the corner pub for a few pints. Crawling home can save a few pints o' oil.
So........save the planet - drink more beer!
Ron.