Step 6 –age group adjusted composite accessibility score

As previously discussed, places of employment, being a supplied service are fundamentally different from the other activities that are consumed. This means the accessibility indicator for each of these activities is not comparable. Therefore step 6, which combines the results from the various activities is only performed on the seven consumed activities.

To reduce the 42 results for the consumed activities into a set of six consumed age group adjusted composite accessibility scores, the different age group adjusted multi-modal scores were merged together. This was done in a similar manner to the previous step, but this time a weighting matrix that described the relative importance of each activity type to the specific age group was used. This weighting matrix is provided in appendix E.

This is described mathematically by the following equation:


This equation is applied once for each of the six age groups, combining the seven consumed activity results into a single composite activity result for each age group. This generates six datasets, one for each age group.

The resulting value CAge Group is named the consumed age group adjusted composite accessibility score.