Reifglätte

Reifglätte, a German term, describes a specific type of road surface condition characterized by a smooth, glassy layer of ice that forms on the road. This phenomenon occurs when atmospheric temperatures hover around freezing point, and precipitation, such as rain or melting snow, comes into contact with a sub-zero road surface. Instead of freezing into a rougher layer of ice, the water rapidly transforms into an extremely slick, transparent sheet.

Unlike typical black ice, which can be somewhat visible as a darker, shinier patch on the road, Reifglätte is often virtually indistinguishable from a dry or wet road surface. This makes it particularly hazardous, as drivers may not perceive the danger until their tires lose traction. The smooth, uniform nature of the ice offers minimal friction, leading to a significant reduction in grip.

The formation of Reifglätte is favored by specific meteorological conditions. A common scenario involves warm, moist air moving over a pre-cooled road surface. Even a light drizzle or dew can be sufficient to create this perilous glaze. The transparent quality of Reifglätte means that road markings, potholes, and other surface features can still be visible, potentially lulling drivers into a false sense of security.

Detecting and mitigating Reifglätte is challenging. Warning signs are often insufficient due to the sudden and localized nature of its appearance. Drivers are advised to exercise extreme caution when temperatures are near freezing, especially after periods of rain or during light precipitation. Sudden braking, acceleration, or sharp steering maneuvers should be avoided. Slowing down significantly and maintaining a greater following distance are crucial for safe driving in conditions conducive to Reifglätte.