The recent development of light rail transit in the Twin Cities has been an undeniable success. Plans for additional lines progress, and our ways of shopping, dining, and commuting are changing dramatically. As we embrace riding the new Hiawatha light rail line, an older era comes to mind--the age when everyone rode the more than 500 miles of track that crisscrossed the Twin Cities. In Twin Cities by Trolley, John Diers and Aaron...