[dewitt]

"Road directionality" being only 98.9% accurate seems to be a huge problem for a navigation app!

[throwaway2245]

Road directionality is variable over time. I'm not sure at what rate it changes but I bet it's a lot more than 1.1% per year.

[djrogers]

Hmm, I’ve seen maybe a handful of two-way streets change to one-way over my entire life, and have never seen a one-way street change direction. If ~1% of streets changed direction every year, there’d be mass confusion and frustration.

[nawgz]

Im yet to read TFA, but I could foresee there being plenty of one-way private drives and parking lots - if not included in the study, I tend to agree with you