Memorial Day is a time for remembrance and an opportunity to honor the men and women who lost their lives serving in the armed forces, but for many it’s also the symbolic start of summer. The upside: many Americans will be enjoying cookouts, baseball games, and getaways during the long memorial weekend. The downside: anyone residing in a major urban area will become all too familiar with the harsh realities of miles-long traffic jams that all started because that guy couldn’t be bothered to merge properly.