sentence: Snow plows are used to remove snow from roads to make driving easier and safer.
sentences_before: Snow can also be dangerous, as it can lower visibility and make driving very difficult. When it snows, the snow will melt a little during the daytime and freeze again at night. This makes ice which can make driving conditions very treacherous.
sentences_after: Also, sand or salt may be added to the road to help tires grip the road. When salt is mixed with snow, the snow will melt more easily.
concept_name: snow plow
headings: Snow