High Friction Surface (anti-skid) Treatment

Project completed in 2022

Twisting roads like this one off Witte Road SE are good candidates for High Friction Surface Treatment. If a driver takes this corner too fast, they could lose control and crash into the wall under the bridge. The anti-skid treatment creates greater traction leading up to and inside the curve.

King County applied anti-skid treatment called High Friction Surface Treatment to 16 different roads in spring/summer 2022.

The anti-skid treatment improves safety by increasing traction and reducing the run-off-the-road crashes. This provides more rolling resistance and is most successful on sharp curves where drivers slide off the road and hit fences, other barriers, and end up in the grass or a ditch.

The map below shows the locations where we applied anti-skid treatment.

Road Services uses anti-skid, high friction surface treatment on sharp curves, like those shown in this photo on Vashon Highway SW and 103rd Avenue SW. The anti-skid application adds more rolling resistance which helps prevent drivers from skidding off the road.