How can a driver determine if a road is slippery?

A driver can determine if a road is slippery by looking for glossy surfaces on the pavement. When a road is slick or wet, especially after rain, the surface may appear shiny or glossy. This sheen indicates a potential layer of moisture or oil that can make driving conditions hazardous. Observing such glossiness can serve as a direct visual cue for drivers to exercise caution, reduce speed, and prepare for possible loss of traction.

Other methods, such as observing traffic patterns or checking the weather forecast, can provide additional context about road conditions but are not as immediate or direct in indicating slippery surfaces. Additionally, simply feeling the steering wheel may not give an accurate representation of the road’s surface since it won't provide sufficient information about the level of traction available. Thus, visually assessing the pavement for glossiness is a practical and reliable way to evaluate the slipperiness of the road.