While more information would not hurt, what makes a place walkable is not that complicated. In fact, when we focus on the smaller things like easy identifiable signs notifying drivers of pedestrian crosswalks, bike lanes, wayfaring signage, well designed public spaces and codes that allow zero setbacks and diverse architecture, it doesn't matter if the city is as large as New York City or as small as Savannah. Imo, those smaller things are the areas Jacksonville should pay a lot more attention too. Really we don't even have to go to Portland to identify many of these topics. Good and bad examples can be found right here in the various neighborhoods of the First Coast.