Korelacje parametrów barier drogowych z ASI i THiV (EN 1317) i ich wpływ na bezpieczeństwo kierowcy oraz pasażerów podczas zderzenia

Michał Karkowski

doi:10.7409/rabdim.025.041

Published: 2025-12-23

Vol. 24 No. 4 (2025)

Correlations between road barrier parameters with ASI and THiV (EN 1317) and their impact on driver and passenger safety during a crash

Michał Karkowski

Section: Articles

https://doi.org/10.7409/rabdim.025.041

Abstract

The article presents an extended analysis of the relationship between key road barrier parameters and occupant load indices: Acceleration Severity Index ASI and Theoretical Head Impact Velocity THiV. Three characteristics of high engineering importance were assessed: post spacing, barrier height, and normalized working width. In addition to classical Pearson and Spearman correlations and partial correlations (controlling for TBxx test class and vehicle type), the study presents marginal effects curves with 95% confidence intervals derived from multivariate linear models. The results confirm that greater system compliance (larger spacing and greater working width) is associated with reduced ASI and THiV, while increasing barrier height in the analyzed dataset corresponds to higher ASI/THiV values. The article also discusses design implications and directions for further research.

Keywords:

Acceleration Severity Index (ASI), barrier height, EN 1317 standard, normalized working width, post spacing, road safety barriers, Theoretical Head Impact Velocity (THiV)

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Karkowski, M. (2025). Correlations between road barrier parameters with ASI and THiV (EN 1317) and their impact on driver and passenger safety during a crash. Roads and Bridges – Drogi I Mosty, 24(4), 607–614. https://doi.org/10.7409/rabdim.025.041

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Correlations between road barrier parameters with ASI and THiV (EN 1317) and their impact on driver and passenger safety during a crash

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