Walking 1.2 miles down a bike path is also easier than 0.8 miles through urban areas without sidewalks.
It seems clear the default was chosen to use round numbers, be easy to calculate, and make the issue seem more important. Stricter criteria mean fewer people fall into the category, but it also means those people have more significance challenges.
It seems clear the default was chosen to use round numbers, be easy to calculate, and make the issue seem more important. Stricter criteria mean fewer people fall into the category, but it also means those people have more significance challenges.