- Black ice is relatively smooth, hard, and clear.
- Packed snow eventually turns to black ice, especially when it rains, or when there's a thaw, followed by freeze.
- You must completely remove packed snow if you want to prevent ice buildup.
- Black ice is most slippery when water is present. Then it can be very dangerous. Applying sand to ice greatly improves traction.
This "black ice" formed by freezing of meltwater. It looks bright because it's reflecting the sunset.