[Brendinooo]

>95%...of the use of interstates in a city are for private vehicles belonging to city residents

This is probably nowhere close to true. People living in cities have less reason to use it. Interstates near and through cities benefit the broader region economically through commuters.

But the bulk of the miles of the interstate system are the boring stretches through Wyoming or wherever, and those stretches tie the nation together economically. Half of all big truck miles are on the Interstate, according to some totally random website I found.