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FHWA Home / Safety / Roadway Departure / Pavement Friction / High Friction Surface Treatment Curve Selection and Installation Guide

High Friction Surface Treatment Curve Selection and Installation Guide May 2016

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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Table of Contents

[ Notice and Quality Assurance Statement ] [ Technical Report Documentation Page ]

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

List of Figures

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

List of Tables

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
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Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000