Why would small gravel or sand be useful on icy streets?

Small gravel or sand can provide traction on icy streets, helping vehicles and pedestrians maintain grip and reduce the risk of slipping. Unlike salt, which melts ice, gravel and sand create rough surfaces that enhance friction, making it easier to navigate slippery conditions. Additionally, they are environmentally friendly alternatives that do not contribute to pollution or damage concrete surfaces. Using these materials can improve safety in winter weather without the drawbacks of chemical de-icers.