I've been to US and it's really hard to use public transport in places without sidewalks... Seriously, I once parked on the other side of the road from a cinema and discovered there's no way to cross the road without driving. The way everything is car focused goes way beyond poor lines and timetable. You would have to not only completely rebuild lots of infrastructure but also change culture and habits of most people living there.
Most American cities aren't built around the idea of taking public transit or even walking to your destination. There's a few that do it fairly well like Boston but there's also the issue that lots of people live in suburbs which require people to own cars to get to work.
But in my mind, the real goal is to get people used to public transportation being an actually viable option before they get an over priced truck. Get them used to living without a car bill and then watch them never get a car because of how much it'd cost in car bills, ya know?