High Friction Surface Treatment Curve Selection and Installation Guide - Safety

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May 2016

FHWA-SA-16-034

U.S. Department of Transportation, Federal Highway Administration (logo). Office of Safety logo: Safe Roads for a Safer Future.

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Preface
	What is a High Friction Surface Treatment (HFST)?
	HFST Benefits and Effectiveness
	Purpose and Organization of the HFST Curve Selection and Installation Guide
1. Step 1: Identify Candidate Curves for HFST
	1.1. High Crash Frequency
		1.1.1. Wet Crash
		1.1.2. Roadway Departure Crashes
		1.1.3. Crash Severity
	1.2. Low Pavement Friction
	1.3. Pavement Quality
	1.4. Speed Differentials, Curve Radii, and Superelevation
	1.5. Unsuccessful Prior Low-Cost Treatment Implementations
	1.6. Systemic Approach
		1.6.1. The Process
		1.6.2. Benefits of the Systemic Approach
		1.6.3. Challenges
		1.6.4. Resources
2. Step 2: Conduct Field Verification and Design
3. Step 3: Select Aggregate and Binder Materials
	3.1. HFST Aggregates
	3.2. Bonding Agents
4. Step 4: Determine Application Method and Develop Specifications
	4.1. Application Methods
		4.1.1. Manual
		4.1.2. Semi-Automated
		4.1.3. Fully-Automated
	4.2. HFST Application Specifications
	4.3. Application Lessons Learned
5. Step 5: Estimate Costs and Identify Funding
	5.1. Cost
	5.2. Funding
6. Conclusion
Appendix A - HFST Curve Identification Summary
Appendix B - Other HFST Potential Locations and Uses

Figure 1	HFST Curve Selection and Installation Guide Chapter Organization
Figure 2	Skid Number CMF
Figure 3	Curve Crash Rate as a Function of Radius
Figure 4	HFST Components
Figure 5	Calcined Bauxite
Figure 6	Manual Application
Figure 7	Semi-Automated Binder Pour Spigot
Figure 8	Semi-Automated Aggregate Spreader
Figure 9	Fully-Automated Installation
Figure 10	HFST Cost Breakdown Approximation
Figure 11	Identifying HFST Appropriateness and Feasibility on Horizontal Curves Flow Chart

Table 1	High Friction Surface Treatment (HFST) Effectiveness by State
Table 2	Potential HFST Binders
Table 3	HFST Considerations by Agency

Page last modified on February 1, 2017