ROBERT SMITHSON knew the route of the No. 30 intercity bus by heart. When the twenty-nine-year-old artist boarded the No. 30 on September 30, 1967, to make the short trip between New York’s Port Authority Bus Terminal and the Union Avenue Bridge in Rutherford, New Jersey, little seemed to have changed. He still could have been the teenager with a scholarship to the Art Students League riding the bus between old Clifton High School and the seedy neighborhood in Manhattan where he always disembarked.
Ever since “The Monuments of Passaic” was published in these pages fifty years ago, the bus ride