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Transportation Performance Management

 

State Highway Safety Report (2020) - Iowa

Select HSIP Report Year:

The following provides a summary of the Highway Safety Improvement Program’s (HSIP) safety performance measures and State safety performance targets. As per the Safety PM Final Rule, States are required to set annual safety performance targets in the HSIP annual report for the number of fatalities, rate of fatalities per 100 million vehicle miles traveled (VMT), number of serious injuries, rate of serious injures per 100 million VMT, and number of non-motorized fatalities and serious injuries. The safety performance targets are based on 5-year rolling averages. States have the flexibility to use the methodology they deem most appropriate. FHWA encourages States to review data sets and trends and consider factors that may affect targets. The safety performance targets should be data-driven, realistic, and attainable and should align with the performance management framework and legislative intent.

A State Department of Transportation (DOT) has met or made significant progress towards meeting its safety performance targets when at least four of the five safety performance targets established under 23 CFR 490.209(a) have been met or the actual outcome is better than the baseline performance. The baseline performance is the 5-year average ending with the year prior to the establishment of the target.

The Basis for Target and Additional Comments are provided by the State in their HSIP Annual Report and have not been edited by FHWA. Any questions about individual State reports should be directed to the respective State DOT. For additional information about each State's HSIP, the complete reports are available at https://safety.fhwa.dot.gov/hsip/reports/.

More information and resources on Safety Performance Management are available at https://safety.fhwa.dot.gov/hsip/spm/.

All State data used to populate the State Highway Safety Reports for 2020 are available for download at https://www.fhwa.dot.gov/tpm/reporting/state/tpm_dashboard_data.zip.

  • Number of Fatalities

  • Number of Fatalities 2014 2015 2016 2017 2018 2019 2020 2021 2022
    Annual 322 320 402 330 319 336 337
    5-Year Average 338.6 341.4 344.8
    Target (5-Year Average) 345.8 336.8 337.8
  • Basis for Number of Fatalities Target

    A simple trend analysis of historical fatality data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.
    A simple trend analysis of historical fatality data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.
    A simple trend analysis of historical fatality data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.

  • Data Sources:
    Fatalities: 2014-2019 Final FARS, 2020 FARS Annual Report File
    Targets: 2019-2021 Iowa HSIP Annual Reports

  • Fatality Rate (per 100 million VMT)

  • Fatality Rate
    (per 100 million VMT)
    2014 2015 2016 2017 2018 2019 2020 2021 2022
    Annual 1.03 0.96 1.21 0.99 0.96 1.00 1.13
    5-Year Average 1.030 1.024 1.058
    Target (5-Year Average) 1.011 0.983 1.037
  • Basis for Fatality Rate Target

    A simple trend analysis of historical fatality data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target. This target supports the SHSP goal of continuing to reduce the fatality rate to 1.000 per HMVMT by 2020.
    A simple trend analysis of historical fatality data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target. This target supports the SHSP goal of continuing to reduce the fatality rate to 1.000 per HMVMT by 2020.
    A simple trend analysis of historical fatality data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target. This target supports the SHSP goal of continuing to reduce the fatality rate to 1.000 per HMVMT.

  • Data Sources:
    Fatalities: 2014-2019 Final FARS, 2020 FARS Annual Report File
    VMT: 2014-2020 FHWA Highway Statistics Series, VM-2 Table
    Targets: 2019-2021 Iowa HSIP Annual Reports

  • Number of Serious Injuries

  • Number of Serious Injuries 2014 2015 2016 2017 2018 2019 2020 2021 2022
    Annual 1,522 1,470 1,510 1,467 1,312 1,347 1,312
    5-Year Average 1,456.2 1,421.2 1,389.6
    Target (5-Year Average) 1,396.2 1,370.8 1,327.2
  • Basis for Number of Serious Injuries Target

    simple trend analysis of historical serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.
    A simple trend analysis of historical serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.
    A simple trend analysis of historical serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.

  • Data Sources:
    Serious Injuries: 2021 Iowa HSIP Annual Report
    Targets: 2019-2021 Iowa HSIP Annual Reports

  • Rate of Serious Injuries (per 100 million VMT)

  • Rate of Serious Injuries
    (per 100 million VMT)
    2014 2015 2016 2017 2018 2019 2020 2021 2022
    Annual 4.84 4.43 4.53 4.38 3.94 4.02 4.41
    5-Year Average 4.424 4.260 4.256
    Target (5-Year Average) 4.083 4.002 4.073
  • Basis for Serious Injury Rate Target

    A simple trend analysis of historical serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target. This target supports the SHSP goal of continuing to reduce the serious injury rate below 4.300 per HMVMT by 2020.
    A simple trend analysis of historical serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target. This target supports the SHSP goal of continuing to reduce the serious injury rate below 4.300 per HMVMT by 2020.
    A simple trend analysis of historical serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target. This target supports the SHSP goal of continuing to reduce the serious injury rate below 4.300 per HMVMT.

  • Data Sources:
    Serious Injuries: 2021 Iowa HSIP Annual Report
    VMT: 2014-2020 FHWA Highway Statistics Series, VM-2 Table
    Targets: 2019-2021 Iowa HSIP Annual Reports

  • Number of Non-Motorized Fatalities and Serious Injuries

  • Number of Non-Motorized Fatalities
    and Serious Injuries
    2014 2015 2016 2017 2018 2019 2020 2021 2022
    Annual 125 151 138 126 123 129 142
    5-Year Average 132.6 133.4 131.6
    Target (5-Year Average) 138.1 131.0 129.8
  • Basis for Number of Non-Motorized Fatalities and Serious Injuries Target

    A simple trend analysis of historical non-motorized fatality and serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.
    A simple trend analysis of historical non-motorized fatality and serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.
    A simple trend analysis of historical non-motorized fatality and serious injury data was performed. An integrated moving average model was run to estimate how much risk would be associated with each set of predictions. Our working group settled on using a 75% confidence level. This means we are at least 75% confident the actual 5-year rolling average will be less than the target.

  • Data Sources:
    Fatalities: 2014-2019 Final FARS, 2020 FARS Annual Report File
    Serious Injuries: 2021 Iowa HSIP Annual Report
    Targets: 2019-2021 Iowa HSIP Annual Reports


Additional Comments

N/A

Safety Performance Target Assessment

PLEASE NOTE: Each State’s safety performance target assessment is based on its own State-specific target methodology and program philosophy. Therefore, conclusions should not be drawn based only on the information in the Safety Performance Target Assessment Summary table. For example, the State may have set aggressive targets, and not met those targets, while another State may have set more easily attainable targets, and met those targets. FHWA understands that each State’s safety program is unique and therefore does not prescribe a methodology for States to set targets. States have the flexibility to use the methodology they deem most appropriate when setting their safety performance targets.

Iowa 2020 Safety Performance Target Assessment
Performance Measure 2016-2020 Target 2016-2020 Actual 2014-2018 Baseline Met Target? Better Than Baseline? Met or Made Significant Progress?
Number of Fatalities 345.8 344.8 338.6 YES N/A YES
Rate of Fatalities 1.011 1.058 1.030 NO NO
Number of Serious Injuries 1,396.2 1,389.6 1,456.2 YES N/A
Rate of Serious Injuries 4.083 4.256 4.424 NO YES
Number of non-motorized fatalities and non-motorized serious injuries 138.1 131.6 132.6 YES N/A

Updated: 04/19/2022
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000