On: Interchange in Houston is the same size as an entire city center in Italy

[username90]

Where would you find parking for a hundred thousand cars? You can't really get protests like this without a dense city:

https://upload.wikimedia.org/wikipedia/commons/8/87/March_fo...

[badrabbit → username90]

You'd be surprised. Most of cities like this is parking lots. But yeah, in a protest situation they may not be available. Big marathons and marches happen just fine.