My dad was am IBM lifer, when they said they could wear suits that weren't black he wore a blue suit and his boss asked him if he rode the bus to work.

Wait, I'm confused. Was that supposed to be an insult?!

This is a very legitimate question: In the US, where is it not?

Public buses aren't safe, clean, or timely. Where I am, it's 2.5 hours rather than a 26 minute commute by car. The only reason you ride one is usually if you are already in the proximity of your destination, especially if that destination is downtown. For all other cases, private or ride-share makes way more sense. We're talking buses here, not shuttles, light rails, monorails, etc.

I worked at IBM Research, totally unlike the rest of IBM in terms of how it was run, and being a non-US person it was quite natural for me to take the bus to work because either that or train is how you get to work. I never met any coworkers on there, although I did get to know the cafeteria staff, cleaners, and so on, who all caught the bus, quite well.

In other countries most people use public transportation and small percentage uses car

Many in the US also use public transportation when they can but busses are generally thought of as a last resort. Unlike trains, teams, or subways their schedule is at the whim of traffic. So the general thinking is that if you are going to be stuck in traffic anyways you might as well be comfortable in your own car if you can afford one.

US is different, deal with it.

London buses are a pleasure in contrast.

Interesting, IBM sales and consulting were infamous for sending in an army of blue suits in

That would have been in the 1980s.