Just dicking around with R a bit this afternoon…here is a tree map showing the number of weekday transit riders in each city neighborhood (area) compared to the size of the neighborhood (color).
1. Downtown has many transit riders (because it’s chart area is proportional to that number)
2. Downtown has many riders for it’s geographic size (because it’s dark green in the chart)
Data is from SORTA, 2013 and is available on the data page. Any stop outside of the City limits was classified as ‘other’.