Boulevard Crosser is a job that involves crossing busy boulevards in order to deliver packages. The job requires the use of three words: RUE (3 letters), SCAB (4 letters), and AVENUE (6 letters). RUE is a French word meaning street, SCAB is a slang term for a worker who takes on a job during a strike, and AVENUE is a wide street or road. Therefore, a Boulevard Crosser is someone who crosses busy boulevards to deliver packages, even during a strike.