The Healthy Streets Scorecard ranks London Boroughs on how healthy their streets are according to nine indicators – four ‘outcome’ and five ‘input’ indicators. By combining the indicator scores, each borough is given a final Healthy Streets score.
- The first chart below shows the scores for each of the nine Healthy Streets Scorecard indicators (note that Outer and Inner London boroughs are shaded different colours to aid comparison)
- The second chart below shows the final Healthy Streets scores (again the Inner and Outer London boroughs are shaded different colours to aid comparison)
In both graphs, the scores for Croydon are highlighted.
You can review detailed results for the outcome indicators, the input indicators or a London-wide overview of the 2020 Scorecard results. You can also read our explainer about why we have chosen these nine indicators.
Indicator index (normalised score) chart explained
In the chart above, each of the nine indicator scores have been normalised to adjust the values measured on different scales to a common scale. The borough with the lowest score in the data range is given the value 0, and the borough with the highest score in the data range is given the value 1. Note that a borough that has a normalised value of 1 has not achieved 100% of the indicator target, rather a value of 1 means that the borough has the highest score when compared to all 32 boroughs. (View the actual input and outcome indicator data). We can then compare boroughs and where they sit on a scale of zero to one.
Scorecard (factored score) chart explained
In the chart above, each borough has been given a factored score. Factor scores are composite variables which provide information about a borough’s placement on a scale. Factor scores are given by F=XB, where X is the indicator normalised score for a borough and B is the factor score coefficient (or weight). Each indicator is weighted as 1, or 0.5 if there are two parts to one indicator, for example Modeshare has a weighting of 1, Active travel – walking has a weighting of 0.5 and Active travel – cycling has a weighting of 0.5. The borough’s total factored score is the sum of all indicator factored scores which is then factored to 10 (multiplied by the number of indicators/10) to give a value on the scale between zero and 10. We can then compare boroughs against each other on the scale.