Wyoming: Highway Safety Improvement Program 2021 Annual Report
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Summary
This document is the 2021 Annual Report for Wyoming’s Highway Safety Improvement Program (HSIP), submitted to the Federal Highway Administration. The report addresses the state’s efforts to reduce fatalities and serious injuries on public roads, a core requirement of the Federal-aid HSIP. It details the program’s administrative structure, methodology for project selection, funding implementation, and safety performance trends. The report highlights Wyoming’s reliance on a data-driven Safety Management System (SMS) to prioritize engineering treatments and its coordination with local and tribal entities to address rural road safety needs. Wyoming’s HSIP is administered by the Wyoming Department of Transportation (WYDOT) through its Operations division, with oversight from a Highway Safety Program manager who coordinates with both NHTSA and FHWA. The program utilizes a Safety Management System based on the Highway Safety Manual to identify high-risk locations and select cost-effective countermeasures. WYDOT implements various specific programs, including horizontal curve improvements, intersection upgrades, median barriers, and roadway departure treatments. Project identification relies on crash frequency, expected crash frequency with empirical Bayes adjustment, and relative severity indices. Prioritization is determined primarily by benefit-to-cost ratios and available funding. Local and tribal roads are addressed through the Wyoming Rural Road Safety Program, administered by the University of Wyoming’s Local Technical Assistance Program Center, which uses separate methodologies involving drive-through surveys and crash data analysis. In the 2021 reporting period, WYDOT programmed $28,784,208 in HSIP-related funds, obligating $20,953,846 (72.8%). This includes $16.4 million in standard HSIP funds, with $9.2 million obligated, and significant allocations from penalty funds under 23 U.S.C. 154 and 164. Approximately 25% of HSIP funds were directed toward systemic improvements, such as guardrail upgrades, clear zone improvements, and high-friction surface treatments. The report lists numerous specific projects, many targeting lane and roadway departure crashes, systemic improvements, and icy/snowy road conditions. WYDOT reported no impediments to obligating HSIP funds and noted that the SMS is increasingly driving project selection to ensure efficient use of resources. Safety performance data from 2012 to 2020 shows fluctuating trends in crash outcomes. Fatalities ranged from 87 in 2013 to 150 in 2014, with 127 recorded in 2020. The fatality rate per hundred million vehicle miles traveled (HMVMT) varied between 0.930 in 2013 and 1.590 in 2014, ending at 1.330 in 2020. Serious injuries ranged from 314 in 2018 to 476 in 2014, with 440 reported in 2020. The serious injury rate per HMVMT decreased from 5.052 in 2012 to 3.008 in 2018 before rising to 4.610 in 2020. Non-motorized fatalities remained low, between 4 and 11 annually. The report concludes that WYDOT is improving its evaluation processes and inter-program coordination to better quantify safety benefits and prioritize high-value projects, aligning with the Strategic Highway Safety Plan’s goal of reducing fatal and serious injury crashes.
Key finding
The document is an administrative annual report and does not present original research findings or experimental results.
Methodology
dataset
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| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 3 | 2026-06-10 |
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Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Applied Guidance: countermeasure evaluation
- Empirical Findings: crash risk outcomes
- Methodological Resource: dataset resource