Snow and ice removal equipment removes the snow and ice. Snow shovels and pushers are used to clear roads and walkways by lifting or pushing snow. Snow blowers eliminate the need to lift or push snow off of surfaces. On hard surfaces, ice scrapers and choppers break up ice and packed snow so that it can be removed. In sub-zero conditions, granular ice melt may successfully melt ice on sidewalks and other surfaces. Traction-control devices can be used to provide traction on terrain coated in snow and ice. Roof rakes can be used from the ground to clear snow from roofs, preventing structural damage and water leakage.