Another one for the transportation files: I was headed down Martin Luther King Way the other day and traffic atypically slowed to a crawl. There was no accident, though, nor was traffic unusually heavy. Instead, a test of a light rail train was in progress and it had caused a bout of rubber necking. Maybe it’s no surprise that after a decade of construction and endless cost overruns that people can’t believe a train is actually running on the tracks. But let’s hope the phenomenon doesn’t continue in July, when the line is supposed to start functioning for real.