Which area may be slippery immediately after it has just reached freezing?

The area that may be slippery immediately after it has just reached freezing is a bridge or shaded area. This is due to the fact that bridges and shaded areas tend to cool down more quickly than regular road surfaces. When temperatures drop and the humidity is high, these areas can form ice before the surrounding roads do, leading to unexpected slippery conditions.

Bridges are often exposed to air from both above and below, which makes them more susceptible to freezing. Additionally, shaded areas may not receive as much sunlight, which means that any moisture present can freeze more rapidly compared to other surfaces that might be in direct sunlight.

In contrast, freshly paved roads, densely populated areas, and well-lit highways might retain heat longer and are less likely to become slippery as quickly as bridges or shaded segments. This understanding is crucial for drivers to remain vigilant for potentially hazardous conditions following freezing temperatures, especially in these specific locations.