The US's urbanization rate is 82% which is higher than Canada, Norway, Spain, France, Greece, Taiwan, Germany, Switzerland, Italy, Austria, Portugal, Ireland, and 150 other countries.
The US doesn't have much of its population distributed outside of urban areas compared to most countries. The US actually has few people outside of urban areas compared to most countries.
https://en.wikipedia.org/wiki/National_Popular_Vote_Intersta... is one step towards sanity.
Unless you have some data to prove otherwise?
All of this obviously leads to much higher density. Planning rules effectively ban detached houses in many suburbs, as a minimum density is enforced. The higher density you have, the more effective public transport systems are.
Suburban apartment blocks also seem to be somewhat rarer in the US.