Which roadways are more likely to be slippery after a snow or rainstorm?

Roadways in shady areas are more likely to be slippery after a snow or rainstorm due to the prolonged presence of moisture and lower temperatures that can prevent ice from melting. In shaded areas, sunlight does not reach the pavement effectively, leading to conditions where water can freeze or remain slick for longer periods compared to more exposed road surfaces. This increases the risk of black ice formation, where a thin layer of ice can be nearly invisible to drivers.

Highways in urban areas might be more frequently treated with salt and sand, making them less slippery. Interstate rest stops typically have well-maintained surfaces and are cleared of snow and ice more quickly due to their priority status. Residential streets often see less traffic and may not be treated as effectively as major roads, but they still generally receive more sun exposure and may improve in conditions more rapidly than shaded areas. Thus, shaded roadways present unique challenges for drivers after adverse weather conditions.