What device removes snow from the road in winter?

The snow plow is the correct answer because it is specifically designed to clear snow and ice from roadways during winter weather. This device consists of a wide blade that is attached to a vehicle, usually a truck, which pushes the snow to the side of the road or into designated areas. Snow plows are essential for maintaining safe driving conditions in winter by ensuring that roadways are cleared for vehicles to travel safely.

Other devices mentioned, while related to winter road maintenance, serve different purposes. A snow blower is typically used for smaller areas, like driveways or sidewalks, rather than large roadways. Road scrapers are primarily used for grading and maintaining unpaved roads, not specifically for removing snow. A salt spreader, on the other hand, is used to distribute salt or other de-icing materials on the road to melt snow and ice, but does not physically remove it. Thus, the snow plow is the most appropriate and effective choice for snow removal on roads.