High Friction Surface (anti-skid) Treatment

Witte Road SE. — 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.

Contact us

Broch Bender, Communications Manager
Desk 206-263-1189
Email

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Project locations map

High Friction Surface Treatment locations
Letter on map	Road	Actual location	Length in feet	Date
VASHON
E	SW 204th Street	107th Avenue SW to 111th Avenue SW	300	Complete
F	SW Bank Road	Commons Road SW to Thorsen Road SW	300	Complete
NORTHEAST
J	Fay Road NE	State Route 203 to 302nd Way NE	300	Complete
N	NE Union Hill Road	238th Avenue NE to 240th Way NE	400	Complete
L	Batten Road NE	NE 140th Street to 290th Avenue NE	600	Complete
SOUTHEAST
C	169th Avenue SE	Licorice Fern Trail to SE 112th Street	410	Complete
G	SE Sweeney Road	212th Avenue SE to SE 222nd Street	700	Complete
A	Witte Road SE	SE 230th Place to SE 228th Street	400	Complete
H	Witte Road SE	SE 225th Place to State Route 169	325	Complete
P	SE Covington-Sawyer Road	181st Avenue SE to 184th Place SE	450	Complete
M	212th Way SE	SE 368th Street to SE 376th Street	350	Complete
I	SE Green Valley Road	House #17225 and House #17601 (near Doreen Johnson Conservation Area)	350	Complete
O	SE 128th Street	Between 166th Ave SE and Patriot Way	600	Complete
B	SE Jones Road	House #17601 and House #17711	350	Complete
D	352nd Avenue SE	SE 254th Street to SE 252nd Street	600	Complete
K	Black Diamond-Ravensdale Road SE/SE Ravensdale Way	SE Ginder Lake Road to 267th Avenue SE	350	Complete
TOTAL			6,785