The effectiveness of High-Friction Surface Treatments
Services: High Friction Surface Treatment
What is HFST?
High-Friction Surface Treatments (HFST) are an essential technology in improving road safety in the United States. They are designed to enhance the frictional properties of road surfaces, significantly improving vehicle traction, especially in high-risk areas like sharp curves, intersections, and steep grades.
HFST involves applying a thin layer of durable, high-friction aggregates bonded to the pavement with a polymer resin. This treatment creates a rougher texture on the road surface, increasing the friction between the road and vehicle tires. This enhanced friction reduces skidding, improves vehicle control – particularly in adverse weather conditions – and reduces the risk of hydroplaning, all of which contribute to a safer driving experience and potentially lower the incidence of traffic accidents.
Enhancing Road Safety
Increased Traction: The primary benefit of HFST is the significant increase in road surface friction. Enhanced traction is critical in preventing vehicles from losing control, particularly on curves and during sudden stops.
Reduction in Accidents: Numerous studies and real-world implementations have shown the effectiveness of HFST in reducing accidents. According to the Federal Highway Administration (FHWA), HFST can reduce crashes by up to 50% on treated segments. This reduction is particularly notable in areas prone to wet weather accidents and sharp curves.Cost-Effective Solution: While the initial cost of HFST may be higher than traditional road treatments, the long-term benefits far outweigh these costs. A recent before and after study from South Carolina DOT shows benefit-cost ratios of approximately 24 to 1.
Additionally, reduced accident rates lead to fewer emergency responses, lower medical costs, and less property damage, ultimately saving public funds and enhancing community safety.
Successful Implementations in the USA
Several states have successfully implemented HFST, demonstrating its effectiveness in improving road safety:
Kentucky: HFST was applied to a series of high-crash locations, including sharp curves and intersections. Post-treatment analysis of a 2013 study revealed a 69% reduction in wet roadway crashes, highlighting the treatment’s efficacy. Similarly, dry-weather roadway departure crashes have declined steeply, from 126 to 28.
Pennsylvania: Pennsylvania has been a leader in HFST adoption, treating numerous high-risk sites. In a 2023 report by the state’s Department of Transportation, analysis of the data found that “HFST was associated with a statistically significant reduction in crash frequency of between 30% and 76% for all crash types considered. At intersections, HFST was associated with a statistically significant reduction in crash frequency of between 66% and 76%”
Florida: In Florida, the use of HFST on tight curves has reduced the rate of total crashes by 32% and wet-weather crashes by 75% on average. Other agencies have reported crash reductions ranging from 24% to 70% to even 93%. Consequently, the state continues to expand its HFST program to further enhance road safety.
The Future of HFST
As HFST continues to prove its effectiveness, its adoption is expected to increase. The FHWA supports the widespread use of HFST as part of its Every Day Counts (EDC) initiative, encouraging state and local agencies to integrate this technology into their road safety strategies. Advancements in materials and application techniques are anticipated to make HFST even more accessible and cost-effective.
High-Friction Surface Treatments are a crucial component of road safety measures. By significantly increasing traction, especially in high-risk areas, HFST helps reduce accidents, save lives, and lower costs associated with road incidents. Since it doesn’t require repaving, HFST is often seen as a cost-effective solution. The success stories from various states underscore the importance of continued investment in HFST to create safer roads for all users. As technology and implementation practices evolve, HFST will undoubtedly play an even more significant role in enhancing road safety across America.