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Transportation Performance Management

 

State Highway Safety Report (2020) - South Carolina

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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 823 979 1,020 989 1,036 1,006 1,064
    5-Year Average 969.4 1,006.0 1,023.0
    Target (5-Year Average) 1,011.0 1,005.0 1,061.0
  • Basis for Number of Fatalities Target

    The target of 1011.0 traffic fatalities was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2019 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2020. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in the number of traffic fatalities during calendar year 2020. This target supports the SHSP goal of eliminating traffic fatalities in SC.
    The target of 1005.0 traffic fatalities was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analyses was used to determine projected 2020 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2021. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in the number of traffic fatalities during calendar year 2021. This target supports the SHSP goal of eliminating traffic fatalities in SC.
    The target of 1061.0 traffic fatalities was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2021 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2022. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease from the increasing trend in the number of traffic fatalities during calendar year 2022. This target supports the SHSP goal of eliminating traffic fatalities in SC.

  • Data Sources:
    Fatalities: 2014-2019 Final FARS, 2020 FARS Annual Report File
    Targets: 2019-2021 South Carolina 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 1.65 1.89 1.87 1.78 1.82 1.74 1.97
    5-Year Average 1.802 1.820 1.836
    Target (5-Year Average) 1.819 1.760 1.820
  • Basis for Fatality Rate Target

    The target of 1.819 as the fatality rate was established by using the projected fatality number in 2020 along with an expected 1% increase in vehicle miles traveled during that year. As part of the SHSP, reducing the fatality rate remains a valuable target for the state.
    The target of 1.670 as the fatality rate was established by using the projected fatality number in 2021 along with an expected 3% increase in vehicle miles traveled during that year. As part of the SHSP, reducing the fatality rate remains a valuable target for the state.
    The target of 1.820 as the fatality rate was established by using the projected fatality number in 2022 along with an expected 2% increase in vehicle miles traveled during that year. As part of the SHSP, reducing the fatality rate remains a valuable target for the state.

  • 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 South Carolina HSIP Annual Reports

  • Number of Serious Injuries

  • Number of Serious Injuries 2014 2015 2016 2017 2018 2019 2020 2021 2022
    Annual 3,185 3,092 3,049 2,951 2,642 3,199 2,600
    5-Year Average 2,983.8 2,986.6 2,888.2
    Target (5-Year Average) 2,781.0 2,950.0 2,850.0
  • Basis for Number of Serious Injuries Target

    A target of 2781.0 serious injuries was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2019 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2020. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in serious injuries during calendar year 2020. This target supports the SHSP goal of reducing serious injuries that resulted from a traffic collision.
    A target of 2950.0 serious injuries was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analyses was used to determine projected 2020 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2021. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in serious injuries during calendar year 2021. This target supports the SHSP goal of reducing serious injuries that resulted from a traffic collision.
    A target of 2850.0 serious injuries was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2021 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2022. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in from the increasing trend in the number serious injuries during calendar year 2022. This target supports the SHSP goal of reducing serious injuries that resulted from a traffic collision.

  • Data Sources:
    Serious Injuries: 2021 South Carolina HSIP Annual Report
    Targets: 2019-2021 South Carolina 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 6.38 5.98 5.59 5.32 4.65 5.52 4.82
    5-Year Average 5.584 5.412 5.180
    Target (5-Year Average) 4.979 5.350 4.892
  • Basis for Serious Injury Rate Target

    The target of 4.979 as the serious injury rate was established by using the projected serious injury number in 2020 along with an expected 1% increase in vehicle miles traveled during that year. As part of the SHSP, reducing the serious injury rate remains a valuable target for the state.
    The target of 5.350 as the serious injury rate was established by using the projected serious injury number in 2021 along with an expected 1% increase in vehicle miles traveled during that year. As part of the SHSP, reducing the serious injury rate remains a valuable target for the state.
    The target of 4.892 as the serious injury rate was established by using the projected serious injury number in 2022 along with an expected 2% increase in vehicle miles traveled during that year. As part of the SHSP, reducing the serious injury rate remains a valuable target for the state.

  • Data Sources:
    Serious Injuries: 2021 South Carolina HSIP Annual Report
    VMT: 2014-2020 FHWA Highway Statistics Series, VM-2 Table
    Targets: 2019-2021 South Carolina 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 337 345 412 433 439 445 465
    5-Year Average 393.2 414.8 438.8
    Target (5-Year Average) 380.0 440.0 500.0
  • Basis for Number of Non-Motorized Fatalities and Serious Injuries Target

    The target of 380.0 non-motorized fatalities and serious injuries was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2019 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2020. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in fatalities and serious injuries involving pedestrians and bicyclists during calendar year 2020.
    The target of 440.0 non-motorized fatalities and serious injuries was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analyses was used to determine projected 2020 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2021. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in fatalities and serious injuries involving pedestrians and bicyclists during calendar year 2021.
    The target of 500.0 non-motorized fatalities and serious injuries was established after thorough analysis of historic data and trend line projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2021 data, then using this projection the state was able to determine a reasonable target for the five year period ending in 2022. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in the decreasing trend in the number in fatalities and serious injuries involving pedestrians and bicyclists during calendar year 2022.

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

South Carolina 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 1,011.0 1,023.0 969.4 NO NO NO
Rate of Fatalities 1.819 1.836 1.802 NO NO
Number of Serious Injuries 2,781.0 2,888.2 2,983.8 NO YES
Rate of Serious Injuries 4.979 5.180 5.584 NO YES
Number of non-motorized fatalities and non-motorized serious injuries 380.0 438.8 393.2 NO NO

Updated: 04/19/2022
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