The Proterra rider sweeper combines superior maneuverability, simple operation and a 64-inch dust-controlled sweeping path to set a new standard of cleaning productivity for rider sweepers. The patented DustClear Five-Stage Dust Control system controls dust at the side brooms. The Proterra's dust suppression system emits a light mist at the side brooms that bonds to dust so that it settles and is immediately swept into the main broom chamber instead of drifting into the air. A vacuumized main broom chamber provides consistent airflow into the broom chamber to ensure all dust is contained in the main hopper. An Ultra-Web® nanofiber filter then removes any remaining dust particles from the air stream.