There are even FlixBusses in the US. I see them pretty often. There are a number of nation-wide and regional inter-city bus systems. They're just not extremely

There are even FlixBusses in the US. I see them pretty often. There are a number of nation-wide and regional inter-city bus systems. They're just not extremely popular since car ownership is typically pretty high, fuel costs are generally low-ish, and chances are when you get to your destination you'll need a car anyways. See companies like: https://vonlane.com/ https://vonlane.com/ https://www.vamoosebus.com/ https://www.vamoosebus.com/ https://www.luxbusamerica.com/ https://www.luxbusamerica.com/