.... in the USA.

I live in the UK where highways majority used for inter city transport.

I can't tell about the UK, but it's definitely true as well in France and Germany.

And a quick look at map of London and Birmingham suggests that it may very well be the case in the UK as well…

Maybe actually looking at research and statistics might serve you better than casually glancing at maps and taking wild guesses.

I'll get you started:

https://www.gov.uk/government/statistics/national-travel-sur...

Funny how you don't even bothered to get the data by yourself get still felt entitled to act like a jerk.