Investigating speed-safety association: Considering the unobserved heterogeneity and human factors mediation effects.

ABSTRACT: The relationship between mean speed and crash likelihood is unclear in the literature. The contradictory findings can be attributed to the masking effects of the confounding variables in this association. Moreover, the unobserved heterogeneity has almost been criticized as a reason behind the current inconclusive results. This research provides an effort to develop a model that analyzes the mean speed-crash frequency relationship by crash severity and type. Also, the confounding and mediation effects of the environment, driver, and traffic-related attributes have been considered. To this end, the loop detector and crash data were aggregated daily for rural multilane highways of Tehran province, Iran, covering two years, 2020-2021. The partial least squares path modeling (PLS-PM) was employ

SUBMITTER: Nassiri H 

PROVIDER: S-EPMC9943019 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature