[irrational]

No they don’t. I’ve often put my kids on intercity (really interstate) buses to go visit their grandparents. I’ve never had to show ID and they don’t have ID.

[wolverine876]

Did you show it when you bought the tickets? Which bus line?

I remember news stories about it, and thinking that people could no longer travel anonymously.

[irrational]

These are private bus lines like Flixbus.

[brnt]

They require ID here in Europe. They don't always check for it, but probably they want to avoid delays in case the bus is checked at a border.

[wolverine876]

Are there public interstate bus lines?

[irrational]

Public? No. Though, the one most people think of is Greyhound and maybe they do check ID. I was just emphasizing that I was not using Greyhound.