“I live in Alexandria, Virginia. Near the Supreme Court chambers is a toll bridge across the Potomac. When in a rush, I pay the dollar toll and get home early. However, I usually drive outside the downtown section of the city and cross the Potomac on a free bridge. This bridge was placed outside the downtown Washington, DC area to serve a useful social service, getting drivers to drive the extra mile and help alleviate congestion during the rush hour. If I went over the toll