When are roads typically the most slippery?

Roads are typically the most slippery during the first few minutes of rain. This is because the initial rainfall can mix with oils and debris that have accumulated on the road surface, creating a slick and hazardous layer. As the rain begins to fall, it lifts these substances to the surface, significantly reducing traction for vehicles. Once the rain continues, it tends to wash away these oils and debris, allowing the surface to become less slippery over time.

Understanding this phenomenon can help drivers remain cautious during the early moments of rain, as that is when the risk of losing control is heightened.