Copyright © 2005 http://TastesOfTheWorld.net A researcher has stirred up the commuter coffee mug with the suggestion that morning rush hour traffic is worsened by stops for daily morning gourmet coffee at Starbucks and other premium coffee houses. Nancy McGuckin, a travel behavior analyst, studied a report called “National Household Travel Survey” by the U.S. Department of Transportation as the basis for her provocative conclusions. It has long been known that frequent starting and stopp.