Application of propensity scores and potential outcomes to estimate effectiveness of traffic safety countermeasures: Exploratory analysis using intersection lighting data

► Exploratory analysis using propensity score-potential outcomes framework to determine countermeasure effectiveness of safety countermeasures. ► Modeled treatment assignment mechanism in the form of propensity scores. ► Determined the safety effect of intersection lighting. ► This method attempts to minimize the selection bias. ► Can also be used to identify comparable sites for traditional analysis methods.