This past weekend, Beltway traffic began moving entirely on the gleaming new span of the Woodrow Wilson Bridge, the completed first half of a project to replace the old river-crossing with 12 shimmering lanes, arcing from Virginia, through a sliver of District, into Maryland. Almost immediately, reports NBC 4, demolition began on the old Wilson bridge. That old bridge was a pain. It was cramped and usually jammed. Planners hadn’t anticipated the crush of traffic…