A metric’s contribution to its driver score is calculated by multiplying the metric’s (normalised) score by its weighting. Weightings are derived through Principal Components Analysis. For more details, see Methodology.

This is defined by the metrics with the highest unweighted score out of 100. 

This is defined by the metrics with the lowest weighted score out of 100, such that these metrics would have the greatest impact on the overall score.

For metrics that have binary outcomes (yes=100/no=0), no comparative income group average is reported.

Why is this metric important for better infrastructure outcomes?