The Center for Neighborhood Technology recently released a web tool that allows you to look at different geographic data relating to housing and transportation costs.

It’s called the H+T Affordability index. The thought is we shouldn’t look just at housing costs when evaluating house affordability. We need to consider transportation costs as well.

Often you’ll hear home buyers mention how much more house they can get further in the sprawling areas. What’s often not mentioned is living there has higher transportation costs because there’s more driving, less public transit, and reduced walkability and bikeability. Combining housing and transportation costs should give a more accurate estimation of affordability.

What’s interesting about the H+T web tool is it lets you select and view different datasets. One very interesting dataset is the average street block size. The smaller the blocksize, the most walkable the area likely is.

And more bikeable.

Below is a screenshot showing average block sizes for Metro Detroit. Based on my experience, this matches well with this area’s bikeability. Detroit and the inner ring suburbs are very good while the outer suburbs are not very good at all.

There are some dark spots in otherwise bikeable communities. These are often parks, golf courses, major industrial zones, or other superblocks.

Does this map estimate road bikability in your neighborhood?