The Barrier: Recent graduate, Arthur Macdonald, narrowly avoids a collision with a truck when he takes a short-cut to work. In his job as traffic safety engineer he proposes to erect a median barrier to prevent collisions. His proposal meets with derision from his boss and indifference from the politicians and the public, but Arthur isn't about to give up. He struggles on toward his goal, despite limited resources, office politics, and City politics.