HFSTs are pavement surfacing systems that provide skid-resistant, and deck sealing properties not typically associated with conventional materials. The spot application of a thin layer of durable, high friction aggregates as a topping on specially engineered resin or a polymer binder affords long-lasting traction (as stated by manufacturer information), while making the overlay much more resistant to wear and polishing. The Montana Department of Transportation (MDT) has initiated this project to apply these treatments to the selected decks in effort to validate the added friction and durability claims. This report can be downloaded from MDT's web site at https://www.mdt.mt.gov/other/webdata/external/research/docs/epsl/polycarb_kal/EVALUATION.pdf
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