> The US is the most advanced country technologically

Certainly not in cars. The US car industry really more or less stopped even _trying_ to compete internationally in the 90s or so. The sole exception was Ford, but they went for an unusual approach where Ford Europe designed its own cars, using parts from Bosch etc. Ford Europe is now also all but dead in the consumer space, too. To a large extent the US car industry survives due to protectionism (notably this: https://en.wikipedia.org/wiki/Chicken_tax).

Incidentally, it's far from what you'd expect, but the US is actually probably more influential in public transport than private transport on an export basis; Cummins is very competitive in the diesel engine space for buses, and the ridiculously-named Wabtec (previously GE and Westinghouse's train-y divisions) is big in locomotive tech.

Though AIUI US companies are largely failing to keep up there, now, too; diesel city buses are on the way out, and electric bus powertrains are largely Chinese or European.