High Friction Surface Treatment - Completed July 2015

In summer of 2015, we installed high friction surface treatment (HFST) to increase traction on two freeway ramps with some of the highest percentages of wet weather-related collisions in Washington state. Crews laid down a special mixture of sand and rock mix on the 148th Avenue Southeast on-ramp to westbound Interstate 90 in Bellevue and in Everett on the eastbound State Route 526 on-ramp to southbound Interstate 5.


How you benefit

Improves safety
By installing HFST, WSDOT anticipates a dramatic drop in the number of wet weather-related crashes at each ramp.

Relieves congestion
Reducing collisions on these two ramps will reduce the traffic congestion that occurs when drivers can’t get around the scene.


Partnerships & cooperation
WSDOT worked closely with the cities of Everett and Bellevue to coordinate the construction closures and impacts.


The approximate cost of this project was $355,000. It was paid for by funds set aside by the Washington State Legislature for low cost enhancement projects.  


Contact us
Northwest Region Communications
15700 Dayton Ave. N.
Seattle, WA 98133
206-440-4697 (ext. 8)

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High Friction Surface Treatment Video Thumbnail
Watch as contractor crews working for WSDOT apply high friction surface treatment to the ramp in Bellevue.