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                Media ContactsMenu FHWA Highway Safety Programs Home
                        HSIP 2016 National Summary Report


            
            In This Section
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                Data-Driven Safety Decision Making.
Beginning in 2016, the HSIP National Summary Report includes an evaluation of how states are using data-driven safety decision making to support their HSIP. This includes the States safety program administered under the HSIP and the methodologies states use to identify projects in each of these programs, as well as the amount of funds used for systemic improvements. On average, States obligated 38 percent of HSIP funds to address systemic improvements. The following sections and figures present information on State's safety programs and problem identification methodologies.

State Safety Programs Administered Under HSIP

States provide a brief overview of each program administered under the HSIP as part of their annual HSIP report. The HSIP Manual[3] defines a program as a group of projects (not necessarily similar in type or location) implemented to achieve a common highway safety goal. For example, some States have one program that includes all projects resulting from the HSIP planning component. Other States have multiple "sub" programs. An example of a "sub" program may be a skid treatment program designed to reduce wet-weather-related crashes at different locations. Some States also refer to "sub" programs as initiatives.

Figure 2 and Figure 3 present the number of State safety programs for the 2016 reporting period. Most states have "Intersection" (30 States) and "Roadway Departure" (29 States) programs. Twenty-nine states selected 49 programs in the "Other" category. Examples of programs in the "Other" category are: "pavement marking improvements", "longitudinal rumble strips", and "vulnerable road users".

Figure 2 illustrates the number of State safety programs (top 9). The top 9 state safety programs are intersection, roadway departure, local safety, median barrier, horizontal curve, pedestrian safety, crash data, low-cost spot improvements, and skid hazard.


**Figure 2: Number of State Safety Programs (top 9)**

Figure 3 illustrates the number of State safety programs (bottom 9). The bottom 9 state safety programs are sign replacement and improvement, bicycle safety, segments, rural state highways, shoulder improvements, right angle crash, left turn crash, safe corridor, and red light running prevention.


**Figure 3: Number of State Safety Programs (bottom 9)**

Methodology Types for Selected Programs Administered Under HSIP

For each State safety program administered under the HSIP, a State can also indicate what project identification methodology (PIM) was used for each program, consistent with the 13 PIMs or performance measures defined in the Highway Safety Manual[4]. Figure 4 presents the number of times a particular PIM was selected by the States. Please note that a State can select more than one PIM for each safety program. "Crash frequency" was selected 228 times while "Excess expected crash frequency using methods of moments" was only selected 2 times. Examples of methodologies in the "Other" category are: "Collaboration with county engineers" and "Hierarchical Bayesian Model".

Figure 4 illustrates the count of PIM selected for programs administered under HSIP. The order of PIMS (from highest to lowest) is crash frequency, crash rate, relative severity index, excess proportions of specific crash types, probability of specific crash types, critical rate, equivalent property damage only (EPDO) crash frequency, expected crash frequency with EB adjusted, excess expected crash frequency with the EB adjustment, excess expected crash frequency using SPFs, level of service of safety, EPDO


**Figure 4: Count of PIM selected for programs administered under HSIP**
      
  Book traversal links for Data-Driven Safety Decision Making.
      ‹ HSIP Funding Approach
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                    HSIP Projects Overview ›
                
                Book:HSIP 2016 National Summary Report
              Executive Summary
                Background
                HSIP Funding Approach
                HSIP Funding Approach
                Data-Driven Safety Decision Making.
                HSIP Projects Overview
                Project Cost
                Functional Class and Ownership
                Improvement Categories and Subcategories.
                SHSP Emphasis Areas
                2013-2016 Comparison
                Comparison to Previous Years
                Benefit-Cost Analysis of the HSIP
                Summary
                References
                Appendix A: Full Description of HSIP Improvement Categories and Sub Categories for 2013 HSIP Reporting Guidance
                Appendix B. Detailed Tables of Project Costs Summaries
                References U.S. DEPARTMENT OF TRANSPORTATION

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