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The friction provided by a roadway surface affects how vehicles interact with the roadway. Measuring, monitoring and maintaining pavement friction can prevent many roadway departure and intersection related crashes, resulting in fewer serious injuries and fatalities.
More than 50 years...
The main purpose of a pavement friction management program is to minimize friction-related vehicle crashes by:
High friction surface treatments (HFST) are pavement treatments that dramatically and immediately reduce crashes, injuries, and fatalities associated with friction demand issues, such as:
In 2008, FHWA began promoting widespread use of certain infrastructure-oriented safety treatments and strategies that can offer significant, measurable impacts as part of any agency’s data-driven, systemic approach to improving safety. FHWA updated the PSCi in 2012, 2017, and 2021, reaching a...
Download the 2-page PSCi overview flyer.
If you experience any technical difficulties while using this program, find any bugs, or have suggestions for improving USLIMITS2, please send an email to help@uslimits.org.
FHWA also offers FREE technical assistance to State and local agencies...
A: The expert system was developed under the National Cooperative Highway Research Program (NCHRP) which is sponsored by AASHTO. A project panel made up of 3 State...
A series of pilot workshops were held around the country to provide platforms for researchers, engineers, law enforcement, educators and policy makers to address speed-setting and enforcement issues. Building on the success of these workshops, the U.S. DOT has developed a Speed Management...