Drivers advised of pavement 'bleeding' during heat wave causing - KPTV - FOX 12

Drivers advised of pavement 'bleeding' during heat wave causing slick conditions

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WASHINGTON COUNTY, OR (KPTV) -

Drivers are being advised to watch for pavement “bleeding” during the heat wave, which can cause slick conditions on roads.

Washington County’s Department of Land Use & Transportation reported that bleeding is the term used for the shiny, oily looking film of asphalt binder that appears on a road during prolonged periods of high temperatures.

Bleeding can cause roads to become slippery. Road crews control the issue by applying sand.

The likelihood of bleeding depends on how much exposure a road has to direct sunlight, how much radiant heat the asphalt holds after the sun goes down and the percentage of oil in the road surface.

Heavy traffic, which draws more oil to the surface, can also be a factor.

Drivers should use caution when temperatures are high and roads appear oily or sound “tacky” when tires hit them.

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