While this is a great visualization, I think that it is missing the traffic volume, which would paint a much more accurate picture of how cities actually work.

While this is a great visualization, I think that it is missing the traffic volume, which would paint a much more accurate picture of how cities actually work. I say this looking at San Diego where if you want to know how the city is designed and how traffic actually flows, there should be 3 big lines running from south south east to north north west (or similar) because those are the 3 major freeways. Instead you have a big north south signal which is not actually reflective of how any traffic flows.