> it's a lot easier to deploy a new program at a 'city level' where everyone more or less lives and travels in similar way than than at a US Federal level where

> it's a lot easier to deploy a new program at a 'city level' where everyone more or less lives and travels in similar way than than at a US Federal level where you are dealing with over 300 million people who live in all kinds of geography and all kinds of different situations. Why ? You can just treat the US a a collection of smaller communities and implement it independently in each of those. All you need to do at the federal level is to instruct the local level to tackle the issue.