When Are Roads the Slickest?

Roads are most slippery when it rains after a dry spell because oil and dirt haven't washed away. Your tires don't grip as well on oil-slicked roads, so slow down when the first rain hits. California's Department of Motor Vehicles recommends driving five to 10 miles per hour slower on wet roads.

When the road is most slippery?

Slow down at the first sign of rain, drizzle, or snow on the road. This is when many road surfaces are most slippery because moisture mixes with oil and dust that has not been washed away.

At what point during rain are roads the slickest?

Slippery Roads

Slow down at the first sign of rain, especially after a dry spell. This is when many roads are the most slippery, because oil and dust have not washed away.