Case Studies on HFST

Learn about case studies on high friction surface treatments (HFST) in the U.S. that were started in the early 2000s.

• Washington, 2004 – Fact Sheet: After applying HFST at the Intersection of Forest Drive and Cole Creek Parkway in Bellevue, Wash., accidents at this intersection dropped 78% and costs associated with accidents declined by 83%.
• Pennsylvania, 2007 – Fact Sheet: On Pennsylvania SR 611 in Northampton County, 234 crashes – 164 of which were wet pavement – and 8 fatalities in total had occurred in the five years prior to the HFST treatment, have experienced 17 crashes (93% reduction) and zero fatalities to date since their implementation.
• Kentucky, 2010 – Fact Sheet: As a result of the Kentucky Transportation Cabinet’s High Friction Surface Treatment and Field Installation Program, yearly wet crash averages declined by 85%, yearly dry crash averages declined by 66% and yearly total crashes declined by 78%.
• South Dakota, 2013 – Fact Sheet: In a “Noteworthy Practice for South Dakota HFST for Winter Road Conditions,” a 78% reduction in run-offroad (ROR) crashes for 2015 was seen when compared to the average number of crashes per year for the before period of 2009 through 2013. Similarly, they observed an 89% reduction for 2016 compared to the before period crashes.